Padronização da interface e atualização do sync entre clientes

2025-11-27 22:02:02 -03:00
1 parent 3f714c88de
commit 7d9d2b0f63
@@ -23,23 +23,43 @@ import { sendAction } from "../socket.js";

 export function renderAudioEditor() {
  const audioEditor = document.querySelector(".audio-editor");
-  const existingTrackContainer = document.getElementById(
-    "audio-track-container"
-  );
+  const existingTrackContainer = document.getElementById("audio-track-container");
+  
  if (!audioEditor || !existingTrackContainer) return;

+  // --- CORREÇÃO DO ERRO DOMException ---
+  // Identificamos quem é o pai real do container de tracks (agora é .audio-tracks-wrapper)
+  const tracksParent = existingTrackContainer.parentElement;
+
  // --- CRIAÇÃO E RENDERIZAÇÃO DA RÉGUA ---
-  let rulerWrapper = audioEditor.querySelector(".ruler-wrapper");
+  // Buscamos a régua dentro desse pai correto
+  let rulerWrapper = tracksParent.querySelector(".ruler-wrapper");
+  
  if (!rulerWrapper) {
+    // Se a régua criada pelo JS ainda não existe, cria ela
+    // (Ignora a régua estática do HTML se houver conflito, priorizando esta estrutura)
    rulerWrapper = document.createElement("div");
    rulerWrapper.className = "ruler-wrapper";
    rulerWrapper.innerHTML = `
            <div class="ruler-spacer"></div>
            <div class="timeline-ruler"></div>
        `;
-    audioEditor.insertBefore(rulerWrapper, existingTrackContainer);
+    
+    // Insere ANTES do container de tracks, dentro do pai correto
+    tracksParent.insertBefore(rulerWrapper, existingTrackContainer);
  }

+  // Remove a régua estática antiga se ela ainda estiver lá atrapalhando (opcional, mas recomendado)
+  const staticRuler = tracksParent.querySelector("#audio-timeline-ruler");
+  if (staticRuler && staticRuler.parentElement === tracksParent) {
+      staticRuler.remove();
+  }
+  // Remove elementos soltos antigos se existirem para evitar duplicação
+  const oldLoopRegion = tracksParent.querySelector("#loop-region");
+  const oldPlayhead = tracksParent.querySelector("#playhead");
+  if(oldLoopRegion) oldLoopRegion.remove();
+  if(oldPlayhead) oldPlayhead.remove();
+
  const ruler = rulerWrapper.querySelector(".timeline-ruler");
  ruler.innerHTML = "";

@@ -243,7 +263,9 @@ export function renderAudioEditor() {

  // Recriação Container Pistas (sem alterações)
  const newTrackContainer = existingTrackContainer.cloneNode(false);
-  audioEditor.replaceChild(newTrackContainer, existingTrackContainer);
+  
+  // Substitui no pai correto (tracksParent), não no audioEditor
+  tracksParent.replaceChild(newTrackContainer, existingTrackContainer);

  // Render Pistas (sem alterações)
  appState.audio.tracks.forEach((trackData) => {
@@ -725,7 +747,6 @@ export function renderAudioEditor() {
        const constrainedLeftPx = Math.max(0, newLeftPx);
        let newStartTime = constrainedLeftPx / currentPixelsPerSecond;
        newStartTime = quantizeTime(newStartTime);
-        // (Correção Bug 4 - remove Number())
        updateAudioClipProperties(clipId, {
          trackId: newTrackId,
          startTimeInSeconds: newStartTime,
@@ -756,13 +777,8 @@ export function renderAudioEditor() {
        const clickX = event.clientX - rect.left;
        const absoluteX = clickX + scrollLeft;
        const newTime = absoluteX / currentPixelsPerSecond;
-        // =================================================================
-        // 👇 INÍCIO DA CORREÇÃO (Sincronia de Seek na Pista)
-        // =================================================================
+        // Sincronia de Seek na Pista)
        sendAction({ type: "SET_SEEK_TIME", seekTime: newTime });
-        // seekAudioEditor(newTime); // 👈 Substituído
-        // =================================================================
-        // 👆 FIM DA CORREÇÃO
      };
      handleSeek(e); // Aplica no mousedown
      const onMouseMoveSeek = (moveEvent) => handleSeek(moveEvent);
@@ -856,7 +872,7 @@ export function resetPlayheadVisual() {
  });
 }

-// --- INÍCIO DA NOVA FUNÇÃO (Passo 4: A Função de Desenho) ---
+// --- A Função de Desenho) ---
 // (Adicionada ao final de audio_ui.js)

 /**
@@ -907,5 +923,4 @@ function createPatternViewElement(patternData) {
  });

  return view;
-}
-// --- FIM DA NOVA FUNÇÃO ---
+}
@@ -1,4 +1,6 @@
-// js/file.js
+//--------------------------------------------------------------
+// IMPORTS NECESSÁRIOS
+//--------------------------------------------------------------
 import { appState, saveStateToSession, resetProjectState, loadStateFromSession } from "./state.js";
 import { loadAudioForTrack } from "./pattern/pattern_state.js";
 import { renderAll, getSamplePathMap } from "./ui.js";
@@ -7,21 +9,13 @@ import {
  initializeAudioContext,
  getMainGainNode,
 } from "./audio.js";
+import { DEFAULT_PROJECT_XML } from "./utils.js"
 import * as Tone from "https://esm.sh/tone";
-
 import { sendAction } from "./socket.js";

-const BLANK_PROJECT_XML = `<?xml version="1.0"?>
-<!DOCTYPE lmms-project>
-<lmms-project type="song" version="1.0" creatorversion="1.2.2" creator="LMMS">
-  <head bpm="140" mastervol="100" timesig_numerator="4" timesig_denominator="4" masterpitch="0"/>
-  <song>
-    <trackcontainer width="600" height="300" type="song" visible="1" maximized="0" x="5" y="5" minimized="0">
-    </trackcontainer>
-    <timeline lp0pos="0" lp1pos="192" lpstate="0"/>
-    <controllers/>
-  </song>
-</lmms-project>`;
+//--------------------------------------------------------------
+//
+//--------------------------------------------------------------

 export function handleLocalProjectReset() {
  console.log("Recebido comando de reset. Limpando estado local...");
@@ -89,7 +83,7 @@ export async function loadProjectFromServer(fileName) {
 export async function parseMmpContent(xmlString) {
  resetProjectState();
  initializeAudioContext();
-  appState.global.justReset = xmlString === BLANK_PROJECT_XML;
+  appState.global.justReset = xmlString === DEFAULT_PROJECT_XML;
  
  const audioContainer = document.getElementById("audio-track-container");
  if (audioContainer) {
@@ -305,10 +299,7 @@ export async function parseMmpContent(xmlString) {
  appState.pattern.activeTrackId = appState.pattern.tracks[0]?.id || null;
  appState.pattern.activePatternIndex = 0;

-  // --- SUBSTUIÇÃO DO BLOCO DE RESTAURAÇÃO ---
-  // Em vez daquele bloco try/catch gigante, apenas chamamos a função:
  loadStateFromSession(); 
-  // ------------------------------------------

  await Promise.resolve();
  renderAll();
@@ -324,17 +315,19 @@ export function generateMmpFile() {

 function generateXmlFromState() {
  if (!appState.global.originalXmlDoc) {
-    console.warn("Não há XML original. Retornando vazio.");
-    return "";
+    console.log("Gerando XML a partir do template em branco...");
+    const parser = new DOMParser();
+    appState.global.originalXmlDoc = parser.parseFromString(DEFAULT_PROJECT_XML, "application/xml");
  }

  const xmlDoc = appState.global.originalXmlDoc.cloneNode(true);
  const head = xmlDoc.querySelector("head");
+  
  if (head) {
-    head.setAttribute("bpm", document.getElementById("bpm-input").value);
-    head.setAttribute("num_bars", document.getElementById("bars-input").value);
-    head.setAttribute("timesig_numerator", document.getElementById("compasso-a-input").value);
-    head.setAttribute("timesig_denominator", document.getElementById("compasso-b-input").value);
+    head.setAttribute("bpm", document.getElementById("bpm-input").value || 140);
+    head.setAttribute("num_bars", document.getElementById("bars-input").value || 1);
+    head.setAttribute("timesig_numerator", document.getElementById("compasso-a-input").value || 4);
+    head.setAttribute("timesig_denominator", document.getElementById("compasso-b-input").value || 4);
  }
  
  const bbTrackContainer = xmlDoc.querySelector('track[type="1"] > bbtrack > trackcontainer');
@@ -344,7 +337,6 @@ function generateXmlFromState() {
      .map((track) => createTrackXml(track))
      .join("");
    
-    // Gambiarra para inserir o XML gerado como nós DOM
    const tempDoc = new DOMParser().parseFromString(`<root>${tracksXml}</root>`, "application/xml");
    Array.from(tempDoc.documentElement.children).forEach((newTrackNode) => {
      bbTrackContainer.appendChild(newTrackNode);
@@ -369,21 +361,22 @@ function createTrackXml(track) {
  const lmmsVolume = Math.round(track.volume * 100);
  const lmmsPan = Math.round(track.pan * 100);

+  // 🔥 PROTEÇÃO: Se não tiver instrumento definido, usa Kicker padrão
+  const instrName = track.instrumentName || "kicker";
+  const instrXml = track.instrumentXml || `<kicker><env amt="0" attack="0.01" hold="0.1" decay="0.1" release="0.1" sustain="0.5" sync_mode="0"/></kicker>`;
+
  const patternsXml = track.patterns.map((pattern) => {
      let patternNotesXml = "";

-      // SE for plugin e tiver notas detalhadas, usa elas
      if (track.type === "plugin" && pattern.notes && pattern.notes.length > 0) {
        patternNotesXml = pattern.notes.map(note => {
          return `<note vol="${note.vol}" len="${note.len}" pos="${note.pos}" pan="${note.pan}" key="${note.key}"/>`;
        }).join("\n                ");
      } 
-      // SE for sampler (ou plugin sem notas detalhadas), usa os steps convertidos em notas simples
      else {
        patternNotesXml = pattern.steps.map((isActive, index) => {
          if (isActive) {
            const notePos = Math.round(index * ticksPerStep);
-            // Key 57 é o padrão do LMMS para samples (Lá)
            return `<note vol="100" len="${NOTE_LENGTH}" pos="${notePos}" pan="0" key="57"/>`;
          }
          return "";
@@ -398,8 +391,8 @@ function createTrackXml(track) {
  return `
    <track type="0" solo="0" muted="0" name="${track.name}">
      <instrumenttrack vol="${lmmsVolume}" pitch="0" fxch="0" pitchrange="1" basenote="57" usemasterpitch="1" pan="${lmmsPan}">
-        <instrument name="${track.instrumentName}">
-          ${track.instrumentXml}
+        <instrument name="${instrName}">
+          ${instrXml}
        </instrument>
        <fxchain enabled="0" numofeffects="0"/>
      </instrumenttrack>
@@ -461,5 +454,4 @@ function downloadFile(content, fileName) {
  URL.revokeObjectURL(url);
 }

-export { generateXmlFromState as generateXmlFromStateExported }; 
-export { BLANK_PROJECT_XML }; // Mantenha o que já estava
+export { generateXmlFromState as generateXmlFromStateExported }; 
@@ -5,7 +5,7 @@ import {
  restartAudioEditorIfPlaying,
 } from "./audio/audio_audio.js";
 import { initializeAudioContext } from "./audio.js";
-import { handleFileLoad, generateMmpFile, BLANK_PROJECT_XML } from "./file.js";
+import { handleFileLoad, generateMmpFile } from "./file.js";
 import {
  renderAll,
  loadAndRenderSampleBrowser,
@@ -13,7 +13,7 @@ import {
  closeOpenProjectModal,
 } from "./ui.js";
 import { renderAudioEditor } from "./audio/audio_ui.js";
-import { adjustValue, enforceNumericInput } from "./utils.js";
+import { adjustValue, enforceNumericInput, DEFAULT_PROJECT_XML } from "./utils.js";
 import { ZOOM_LEVELS } from "./config.js";
 import { loadProjectFromServer } from "./file.js";
 import { sendAction, joinRoom, setUserName } from "./socket.js";
@@ -61,6 +61,11 @@ const PROJECT_NAME = new URLSearchParams(window.location.search).get("project");
            ? PROJECT_NAME
            : `${PROJECT_NAME}.mmp`;
        loadProjectFromServer(filename);
+    } else if (!restored && !PROJECT_NAME) {
+        // CORREÇÃO: Se entrou numa sala vazia sem projeto na URL, 
+        // inicializa o XML base para não dar erro depois.
+        const parser = new DOMParser();
+        appState.global.originalXmlDoc = parser.parseFromString(DEFAULT_PROJECT_XML, "application/xml");
    }

 })(); // Fim do initApp
@@ -313,7 +318,7 @@ document.addEventListener("DOMContentLoaded", () => {
      )
    )
      return;
-    sendAction({ type: "LOAD_PROJECT", xml: BLANK_PROJECT_XML });
+    sendAction({ type: "LOAD_PROJECT", xml: DEFAULT_PROJECT_XML });
  });

  addBarBtn?.addEventListener("click", () => {
@@ -341,6 +346,29 @@ document.addEventListener("DOMContentLoaded", () => {
    initializeAudioContext();
    sendAction({ type: "REMOVE_LAST_TRACK" });
  });
+  
+  // 👇 ATUALIZE ESTE LISTENER
+  removeInstrumentBtn?.addEventListener("click", () => {
+    initializeAudioContext();
+    
+    // Pega o ID da faixa que está selecionada/ativa na interface
+    const activeId = appState.pattern.activeTrackId;
+    
+    if (activeId) {
+      // Envia comando seguro por ID
+      sendAction({ 
+        type: "REMOVE_TRACK_BY_ID", 
+        trackId: activeId 
+      });
+    } else {
+      // Fallback: se não tiver ID ativo, tenta pegar a última (comportamento antigo, mas seguro localmente)
+      const tracks = appState.pattern.tracks;
+      if (tracks.length > 0) {
+         const lastId = tracks[tracks.length - 1].id;
+         sendAction({ type: "REMOVE_TRACK_BY_ID", trackId: lastId });
+      }
+    }
+  });

  playBtn?.addEventListener("click", () => {
    initializeAudioContext();
@@ -496,6 +524,35 @@ document.addEventListener("DOMContentLoaded", () => {
    });
  }

+  const removeAudioTrackBtn = document.getElementById("remove-audio-track-btn");
+  if (removeAudioTrackBtn) {
+    removeAudioTrackBtn.addEventListener("click", () => {
+      initializeAudioContext();
+      
+      // Verifica quantas faixas existem
+      const trackCount = appState.audio.tracks.length;
+      
+      if (trackCount > 0) {
+        // Pega a ÚLTIMA faixa da lista
+        const lastTrack = appState.audio.tracks[trackCount - 1];
+        
+        // Verifica se tem clips nela (segurança)
+        const hasClips = appState.audio.clips.some(c => c.trackId === lastTrack.id);
+        if (hasClips && !confirm("A última pista contém clips de áudio. Deseja removê-la mesmo assim?")) {
+            return;
+        }
+        
+        // 🔥 A MUDANÇA CRUCIAL: Envia o ID, e usa o NOME NOVO do comando
+        sendAction({ 
+            type: "REMOVE_AUDIO_LANE_BY_ID", 
+            trackId: lastTrack.id 
+        });
+      } else {
+        showToast("Não há pistas de áudio para remover.", "warning");
+      }
+    });
+  }
+
  // Navegador de Samples (local)
  loadAndRenderSampleBrowser();

@@ -1,4 +1,4 @@
-// js/pattern_state.js
+// js/pattern/pattern_state.js
 import * as Tone from "https://esm.sh/tone";
 import { TripleOscillator } from "../../audio/plugins/TripleOscillator.js";
 import { Kicker } from "../../audio/plugins/Kicker.js";
@@ -11,6 +11,11 @@ import { DEFAULT_VOLUME, DEFAULT_PAN } from "../config.js";
 import { getMainGainNode } from "../audio.js";
 import { getTotalSteps } from "../utils.js";

+// XML padrão para o instrumento Kicker (bateria simples)
+const DEFAULT_KICKER_XML = `<kicker>
+  <env amt="0" attack="0.01" hold="0.1" decay="0.1" release="0.1" sustain="0.5" sync_mode="0"/>
+</kicker>`;
+
 export function initializePatternState() {
  appState.pattern.tracks.forEach(track => {
    try { track.player?.dispose(); } catch {}
@@ -55,20 +60,17 @@ export async function loadAudioForTrack(track) {

  // --- DETECÇÃO DE TIPO DE ARQUIVO ---
  // Verifica se é um formato de áudio que o navegador suporta
-  // Verifica tipo de arquivo
  const isStandardAudio = track.samplePath && /\.(wav|mp3|ogg|flac|m4a)$/i.test(track.samplePath);
-  const isDrumSynth = track.samplePath && /\.ds$/i.test(track.samplePath);
  
-  // Se não for áudio (ou for .ds/.xpf), é Plugin
+  // Se não for áudio padrão, assumimos Plugin (ou Kicker padrão)
  if (!track.samplePath || !isStandardAudio) {
    try {
      if (track.instrument) { try { track.instrument.dispose(); } catch {} }

      let synth;
-      const name = (track.instrumentName || "").toLowerCase();
+      // Normaliza o nome do instrumento. Se vazio, assume kicker.
+      const name = (track.instrumentName || "kicker").toLowerCase();
      
-      // DADOS DO PLUGIN (Tenta parsear XML se for string, ou usa vazio)
-      // Dica: O ideal seria ter um parser real aqui, mas vamos passar {} por enquanto
      const pluginData = {}; 

      // SELETOR DE PLUGINS
@@ -87,64 +89,53 @@ export async function loadAudioForTrack(track) {
            break;
            
        case "nes":
-        case "freeboy": // Freeboy é parecido com NES
-        case "papu":    // Papu também é Gameboy
-        case "sid":     // SID é 8-bit também, usaremos NES como fallback por enquanto
+        case "freeboy": 
+        case "papu":    
+        case "sid":     
            synth = new Nes(Tone.getContext(), pluginData);
            break;

-        // --- PACOTE SUPER SAW ---
-        case "zynaddsubfx": // O clássico
-        case "watsyn":      // Wavetable Synth
-        case "monstro":     // 3 Osciladores monstruosos
-        case "vibedstrings": // Strings vibrantes (fatsaw funciona bem como base)
-        case "SuperSaw":
+        case "zynaddsubfx": 
+        case "watsyn":      
+        case "monstro":     
+        case "vibedstrings": 
+        case "supersaw":
             synth = new SuperSaw(Tone.getContext(), pluginData);
             break;
            
-        case "organic": // Fallback simples para Organic (Additive)
+        case "organic": 
             synth = new Tone.PolySynth(Tone.Synth, {
                 oscillator: { type: "sine", count: 8, spread: 20 }
             });
             break;

-        case "zynaddsubfx": // O monstro!
-             // Zyn é impossível de clonar rápido. Vamos usar um "SuperSaw" gordo como placeholder
-             synth = new Tone.PolySynth(Tone.Synth, {
-                 oscillator: { type: "fatsawtooth", count: 3, spread: 30 },
-                 envelope: { attack: 0.1, decay: 0.3, sustain: 0.8, release: 1 }
-             });
-             break;
-
        default:
-            console.warn(`Plugin ${name} desconhecido, usando fallback.`);
-            // Fallback genérico
-            synth = new Tone.PolySynth(Tone.Synth, { oscillator: { type: "triangle" } });
+            console.warn(`Plugin ${name} desconhecido, usando fallback (Kicker).`);
+            // Fallback seguro: Kicker
+            synth = new Kicker(Tone.getContext(), pluginData);
      }

-      // Se o plugin criou uma classe wrapper (nossas classes .js),
-      // ele tem o método .connect. Se for Tone nativo (Organic/Zyn fallback), também tem.
      if (synth.output) {
-          // Nossas classes customizadas
          synth.connect(track.volumeNode);
      } else {
-          // Objetos Tone.js puros
          synth.connect(track.volumeNode);
      }

      track.instrument = synth;
      track.player = null; 
      track.type = 'plugin';
+      // Atualiza o nome se ele estava vazio
+      if (!track.instrumentName) track.instrumentName = name;
      
      console.log(`[Audio] Plugin carregado: ${name}`);

    } catch (e) {
-      console.error("Erro ao carregar plugin:", name, e);
+      console.error("Erro ao carregar plugin:", track.instrumentName, e);
    }
    return track;
  }

-  // 3. Lógica para SAMPLERS (Arquivos de Áudio Reais)
+  // 3. Lógica para SAMPLERS
  try {
    try { track.player?.dispose(); } catch {}
    track.player = null;
@@ -166,7 +157,7 @@ export async function loadAudioForTrack(track) {

    track.player = player;
    track.buffer = buffer;
-    track.type = 'sampler'; // Garante o tipo correto
+    track.type = 'sampler';

  } catch (error) {
    console.error('Erro ao carregar sample:', track.samplePath);
@@ -181,21 +172,29 @@ export async function loadAudioForTrack(track) {
 export function addTrackToState() {
  const totalSteps = getTotalSteps();
  const referenceTrack = appState.pattern.tracks[0];
+  const newId = Date.now() + Math.random();

  const newTrack = {
-    id: Date.now() + Math.random(),
-    name: "novo instrumento",
+    id: newId,
+    name: `Novo Instrumento ${appState.pattern.tracks.length + 1}`,
    samplePath: null,
-    type: 'plugin', // Padrão
+    type: 'plugin',
+    
+    // 🔥 CORREÇÃO: Definir instrumento padrão (Kicker) e XML
+    instrumentName: "kicker",
+    instrumentXml: DEFAULT_KICKER_XML,
+    
    player: null,
    buffer: null,
    patterns: referenceTrack
      ? referenceTrack.patterns.map(p => ({
          name: p.name,
          steps: new Array(p.steps.length).fill(false),
+          notes: [],
          pos: p.pos
        }))
-      : [{ name: "Pattern 1", steps: new Array(totalSteps).fill(false), pos: 0 }],
+      : [{ name: "Pattern 1", steps: new Array(totalSteps).fill(false), notes: [], pos: 0 }],
+    
    activePatternIndex: 0,
    volume: DEFAULT_VOLUME,
    pan: DEFAULT_PAN,
@@ -206,10 +205,39 @@ export function addTrackToState() {
  newTrack.volumeNode.connect(newTrack.pannerNode);
  newTrack.pannerNode.connect(getMainGainNode());
  
+  // Carrega o áudio (vai cair no case "kicker" do loadAudioForTrack)
  loadAudioForTrack(newTrack);

  appState.pattern.tracks.push(newTrack);
  appState.pattern.activeTrackId = newTrack.id;
+  
+  console.log("Faixa adicionada ao estado com Kicker padrão.");
+}
+
+export function removeTrackById(trackId) {
+  const index = appState.pattern.tracks.findIndex(t => t.id === trackId);
+  
+  if (index !== -1) {
+    const trackToRemove = appState.pattern.tracks[index];
+
+    // Limpeza de memória
+    try { trackToRemove.player?.dispose(); } catch {}
+    try { trackToRemove.buffer?.dispose?.(); } catch {}
+    try { trackToRemove.instrument?.dispose(); } catch {}
+    try { trackToRemove.pannerNode?.disconnect(); } catch {}
+    try { trackToRemove.volumeNode?.disconnect(); } catch {}
+
+    // Remove do array
+    appState.pattern.tracks.splice(index, 1);
+
+    // Ajusta seleção se necessário
+    if (appState.pattern.activeTrackId === trackId) {
+      appState.pattern.activeTrackId = appState.pattern.tracks[0]?.id ?? null;
+    }
+    
+    return true; // Retorna sucesso
+  }
+  return false; // Não achou (o fantasma não existe aqui)
 }

 export function removeLastTrackFromState() {
@@ -9,7 +9,87 @@ const { Server } = require("socket.io");
 const fs = require("fs");
 const path = require("path");
 const pino = require("pino");
-//const { PORT_SOCK } = require("../config.js");
+
+const DEFAULT_PROJECT_XML = `<?xml version="1.0"?>
+                                <!DOCTYPE lmms-project>
+                                <lmms-project version="1.0" type="song" creatorversion="1.2.2" creator="LMMS">
+                                  <head mastervol="100" masterpitch="0" timesig_denominator="4" timesig_numerator="4" bpm="140"/>
+                                  <song>
+                                    <trackcontainer visible="1" y="5" minimized="0" height="300" type="song" x="5" maximized="0" width="600">
+                                      <track muted="0" name="TripleOscillator" type="0" solo="0">
+                                        <instrumenttrack pitchrange="1" fxch="0" usemasterpitch="1" vol="100" pitch="0" pan="0" basenote="57">
+                                          <instrument name="tripleoscillator">
+                                            <tripleoscillator wavetype1="0" pan2="0" finer1="0" finel1="0" userwavefile0="" wavetype0="0" userwavefile1="" finer0="0" stphdetun1="0" vol0="33" wavetype2="0" coarse0="0" finel2="0" finer2="0" modalgo2="2" finel0="0" coarse1="-12" phoffset1="0" pan0="0" modalgo3="2" coarse2="-24" phoffset2="0" pan1="0" vol1="33" phoffset0="0" stphdetun0="0" modalgo1="2" vol2="33" stphdetun2="0" userwavefile2=""/>
+                                          </instrument>
+                                          <eldata fres="0.5" fwet="0" ftype="0" fcut="14000">
+                                            <elvol ctlenvamt="0" lspd_syncmode="0" x100="0" lpdel="0" latt="0" pdel="0" lspd="0.1" lshp="0" hold="0.5" lspd_numerator="4" userwavefile="" att="0" lamt="0" dec="0.5" lspd_denominator="4" sustain="0.5" rel="0.1" amt="0"/>
+                                            <elcut ctlenvamt="0" lspd_syncmode="0" x100="0" lpdel="0" latt="0" pdel="0" lspd="0.1" lshp="0" hold="0.5" lspd_numerator="4" userwavefile="" att="0" lamt="0" dec="0.5" lspd_denominator="4" sustain="0.5" rel="0.1" amt="0"/>
+                                            <elres ctlenvamt="0" lspd_syncmode="0" x100="0" lpdel="0" latt="0" pdel="0" lspd="0.1" lshp="0" hold="0.5" lspd_numerator="4" userwavefile="" att="0" lamt="0" dec="0.5" lspd_denominator="4" sustain="0.5" rel="0.1" amt="0"/>
+                                          </eldata>
+                                          <chordcreator chordrange="1" chord-enabled="0" chord="0"/>
+                                          <arpeggiator arpcycle="0" arptime_denominator="4" arpgate="100" arpdir="0" arpmode="0" arptime_syncmode="0" arp="0" arpmiss="0" arp-enabled="0" arptime="100" arprange="1" arpskip="0" arptime_numerator="4"/>
+                                          <midiport inputchannel="0" outputcontroller="0" fixedoutputvelocity="-1" outputchannel="1" fixedinputvelocity="-1" outputprogram="1" inputcontroller="0" readable="0" fixedoutputnote="-1" basevelocity="63" writable="0"/>
+                                          <fxchain enabled="0" numofeffects="0"/>
+                                        </instrumenttrack>
+                                      </track>
+                                      <track muted="0" name="Sample track" type="2" solo="0">
+                                        <sampletrack vol="100" pan="0">
+                                          <fxchain enabled="0" numofeffects="0"/>
+                                        </sampletrack>
+                                      </track>
+                                      <track muted="0" name="Beat/Bassline 0" type="1" solo="0">
+                                        <bbtrack>
+                                          <trackcontainer visible="0" y="5" minimized="0" height="400" type="bbtrackcontainer" x="610" maximized="0" width="700">
+                                            <track muted="0" name="Kicker" type="0" solo="0">
+                                              <instrumenttrack pitchrange="1" fxch="0" usemasterpitch="1" vol="100" pitch="0" pan="0" basenote="57">
+                                                <instrument name="kicker">
+                                                  <kicker decay="440" version="1" noise="0" endfreq="40" decay_syncmode="0" decay_denominator="4" startfreq="150" env="0.163" startnote="1" dist="0.8" slope="0.06" decay_numerator="4" click="0.4" distend="0.8" gain="1" endnote="0"/>
+                                                </instrument>
+                                                <eldata fres="0.5" fwet="0" ftype="0" fcut="14000">
+                                                  <elvol ctlenvamt="0" lspd_syncmode="0" x100="0" lpdel="0" latt="0" pdel="0" lspd="0.1" lshp="0" hold="0.5" lspd_numerator="4" userwavefile="" att="0" lamt="0" dec="0.5" lspd_denominator="4" sustain="0.5" rel="0.1" amt="0"/>
+                                                  <elcut ctlenvamt="0" lspd_syncmode="0" x100="0" lpdel="0" latt="0" pdel="0" lspd="0.1" lshp="0" hold="0.5" lspd_numerator="4" userwavefile="" att="0" lamt="0" dec="0.5" lspd_denominator="4" sustain="0.5" rel="0.1" amt="0"/>
+                                                  <elres ctlenvamt="0" lspd_syncmode="0" x100="0" lpdel="0" latt="0" pdel="0" lspd="0.1" lshp="0" hold="0.5" lspd_numerator="4" userwavefile="" att="0" lamt="0" dec="0.5" lspd_denominator="4" sustain="0.5" rel="0.1" amt="0"/>
+                                                </eldata>
+                                                <chordcreator chordrange="1" chord-enabled="0" chord="0"/>
+                                                <arpeggiator arpcycle="0" arptime_denominator="4" arpgate="100" arpdir="0" arpmode="0" arptime_syncmode="0" arp="0" arpmiss="0" arp-enabled="0" arptime="100" arprange="1" arpskip="0" arptime_numerator="4"/>
+                                                <midiport inputchannel="0" outputcontroller="0" fixedoutputvelocity="-1" outputchannel="1" fixedinputvelocity="-1" outputprogram="1" inputcontroller="0" readable="0" fixedoutputnote="-1" basevelocity="63" writable="0"/>
+                                                <fxchain enabled="0" numofeffects="0"/>
+                                              </instrumenttrack>
+                                              <pattern pos="0" muted="0" name="Kicker" steps="16" type="0"/>
+                                            </track>
+                                          </trackcontainer>
+                                        </bbtrack>
+                                      </track>
+                                      <track muted="0" name="Automation track" type="5" solo="0">
+                                        <automationtrack/>
+                                      </track>
+                                    </trackcontainer>
+                                    <track muted="0" name="Automation track" type="6" solo="0">
+                                      <automationtrack/>
+                                      <automationpattern pos="0" len="192" name="Numerator" prog="0" tens="1" mute="0"/>
+                                      <automationpattern pos="0" len="192" name="Denominator" prog="0" tens="1" mute="0"/>
+                                      <automationpattern pos="0" len="192" name="Tempo" prog="0" tens="1" mute="0"/>
+                                      <automationpattern pos="0" len="192" name="Master volume" prog="0" tens="1" mute="0"/>
+                                      <automationpattern pos="0" len="192" name="Master pitch" prog="0" tens="1" mute="0"/>
+                                    </track>
+                                    <fxmixer visible="1" y="310" minimized="0" height="333" x="5" maximized="0" width="543">
+                                      <fxchannel volume="1" muted="0" num="0" name="Master" soloed="0">
+                                        <fxchain enabled="0" numofeffects="0"/>
+                                      </fxchannel>
+                                    </fxmixer>
+                                    <ControllerRackView visible="1" y="310" minimized="0" height="200" x="680" maximized="0" width="350"/>
+                                    <pianoroll visible="0" y="5" minimized="0" height="480" x="5" maximized="0" width="860"/>
+                                    <automationeditor visible="0" y="1" minimized="0" height="400" x="1" maximized="0" width="860"/>
+                                    <projectnotes visible="0" y="10" minimized="0" height="400" x="700" maximized="0" width="679"><![CDATA[<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
+                                <html><head><meta name="qrichtext" content="1" /><style type="text/css">
+                                p, li { white-space: pre-wrap; }
+                                </style></head><body style=" font-family:'MS Shell Dlg 2'; font-size:7.5pt; font-weight:400; font-style:normal;">
+                                <p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><br /></p></body></html>]]></projectnotes>
+                                    <timeline lp1pos="192" lpstate="0" lp0pos="0"/>
+                                    <controllers/>
+                                  </song>
+                                </lmms-project>`;
+

 // -------------------------
 // LOGGER DINÂMICO (GERENCIADOR)
@@ -111,7 +191,8 @@ function ensureRoom(roomName) {
    if (fs.existsSync(p)) {
      const j = JSON.parse(fs.readFileSync(p, "utf8"));
      roomStates[roomName] = {
-        projectXml: j.projectXml || null,
+        // 🔥 CORREÇÃO: Fallback para DEFAULT_PROJECT_XML se o JSON salvo estiver sem XML
+        projectXml: j.projectXml || DEFAULT_PROJECT_XML, 
        audio: j.audio || { tracks: [], clips: [] },
        seq: j.seq || 0,
        tokensSeen: new Set(),
@@ -122,8 +203,10 @@ function ensureRoom(roomName) {
    console.warn(`[persist] falha ao carregar estado da sala ${roomName}:`, e);
  }

+  // Cria sala NOVA na memória
  roomStates[roomName] = {
-    projectXml: null,
+    // 🔥 CORREÇÃO: Inicia com o XML do LMMS completo, não mais null
+    projectXml: DEFAULT_PROJECT_XML,
    audio: { tracks: [], clips: [] },
    seq: 0,
    tokensSeen: new Set(),
@@ -245,9 +328,6 @@ function applyAuthoritativeAction(roomName, action) {
    }

    case "UPDATE_AUDIO_CLIP": {
-      // =================================================================
-      // 👇 INÍCIO DA CORREÇÃO (Blindagem do Servidor para Bug 4)
-      // =================================================================
      if (!action.clipId || !action.props) {
        console.warn(
          `[Server] Ação UPDATE_AUDIO_CLIP rejeitada (dados base inválidos):`,
@@ -277,9 +357,6 @@ function applyAuthoritativeAction(roomName, action) {
        );
        return null;
      }
-      // =================================================================
-      // 👆 FIM DA CORREÇÃO
-      // =================================================================

      const c = state.clips.find((x) => String(x.id) === String(action.clipId));
      if (c && action.props && typeof action.props === "object") {
@@ -300,6 +377,29 @@ function applyAuthoritativeAction(roomName, action) {
      break;
    }

+    case "REMOVE_AUDIO_LANE_BY_ID": {
+      // 1. Acha e remove a Track
+      const idx = state.tracks.findIndex((t) => t.id === action.trackId);
+      if (idx !== -1) {
+        state.tracks.splice(idx, 1);
+        mutated = true;
+      }
+
+      // 2. LIMPEZA PROFUNDA: Remove clips dessa track E clips órfãos (trackId null)
+      // Se removemos a track, os clips dela têm que sumir.
+      const prevCount = state.clips.length;
+      state.clips = state.clips.filter((c) => {
+          // Mantém apenas se tiver trackId E se esse trackId ainda existir na lista de tracks
+          const parentTrackExists = state.tracks.some(t => t.id === c.trackId);
+          return c.trackId && parentTrackExists;
+      });
+
+      if (state.clips.length !== prevCount) {
+          mutated = true;
+      }
+      break;
+    }
+
    default:
      // outras ações não são da persistência do editor de áudio
      mutated = false;
@@ -414,13 +514,19 @@ io.on("connection", (socket) => {
    // Carrega estado da sala
    const room = ensureRoom(roomName);

-    // Persiste estado se for LOAD_PROJECT (compat)
-    if (action.type === "LOAD_PROJECT" && action.xml) {
-      room.projectXml = action.xml;
-      saveRoom(roomName);
-      console.log(
-        `[broadcast_action] Estado da sala ${roomName} atualizado (LOAD_PROJECT).`
-      );
+    // Persiste estado do Pattern (Notas/Sequenciador)
+    // Aceita tanto carregamento total quanto atualização de notas
+    if ((action.type === "LOAD_PROJECT" || action.type === "SYNC_PATTERN_STATE") && action.xml) {
+      // Proteção: Não salva se o XML for vazio (evita corromper a sala com o bug antigo)
+      if (action.xml.trim().length > 0) {
+        room.projectXml = action.xml;
+        saveRoom(roomName);
+        console.log(
+          `[broadcast_action] XML da sala ${roomName} atualizado via ${action.type}.`
+        );
+      } else {
+        console.warn(`[Server] Ignorando XML vazio vindo de ${action.type}`);
+      }
    }

    // Aplica ações autoritativas do editor de áudio
@@ -8,6 +8,7 @@ import {
  addTrackToState,
  removeLastTrackFromState,
  updateTrackSample,
+  removeTrackById,
 } from "./pattern/pattern_state.js";
 import {
  addAudioTrackLane,
@@ -37,13 +38,13 @@ import {
  parseMmpContent,
  handleLocalProjectReset,
  syncPatternStateToServer,
-  BLANK_PROJECT_XML,
  generateXmlFromStateExported,
 } from "./file.js";

 import { renderAll, showToast } from "./ui.js"; // showToast()
 import { updateStepUI, renderPatternEditor } from "./pattern/pattern_ui.js";
 import { PORT_SOCK } from "./config.js";
+import { DEFAULT_PROJECT_XML } from "./utils.js"

 // -----------------------------------------------------------------------------
 // Gera um ID único otimista (ex: "track_1678886401000_abc123")
@@ -200,17 +201,12 @@ socket.on("load_project_state", async (projectXml) => {
    // 🔥 CORREÇÃO: Força a restauração da sessão LOCAL logo após carregar o XML
    // Isso garante que suas alterações locais (BPM, steps) "ganhem" do servidor
    if (window.ROOM_NAME) {
-       const raw = sessionStorage.getItem(`temp_state_${window.ROOM_NAME}`);
+    const raw = sessionStorage.getItem(`temp_state_${window.ROOM_NAME}`);
      if (raw) {
-        const parsed = JSON.parse(raw);
-        const hasLocalAudio = parsed.audioSnapshot?.clips?.length > 0 ||
-                              parsed.audioSnapshot?.tracks?.length > 0;
-        if (hasLocalAudio) {
-          console.log("Re-aplicando sessão local sobre o XML do servidor...");
+          // Se existe 'raw', confiamos que é o estado mais recente do usuário.
+          console.log("Re-aplicando sessão local (mesmo se vazia)...");
          await loadStateFromSession();
-        }
      }
-
    }

    renderAll();
@@ -513,6 +509,44 @@ async function handleActionBroadcast(action) {
      showToast(`▶ ${who} Play bases`, "info");
      break;
    }
+    case "UPDATE_PATTERN_NOTES": {
+      const {
+        trackIndex: ti,
+        patternIndex: pi,
+        notes,
+        steps: incomingSteps,
+      } = action;
+
+      const t = appState.pattern.tracks[ti];
+      if (!t) break;
+
+      if (!t.patterns[pi]) t.patterns[pi] = { steps: [], notes: [] };
+
+      t.patterns[pi].notes = Array.isArray(notes) ? notes : [];
+
+      if (Array.isArray(incomingSteps)) {
+        t.patterns[pi].steps = incomingSteps;
+      }
+
+      try {
+        schedulePatternRerender();
+      } catch (e) {
+        console.warn("Erro no render UPDATE_PATTERN_NOTES", e);
+      }
+
+      const isFromSelf = action.__senderId === socket.id;
+      if (window.ROOM_NAME && isFromSelf) {
+        const xml = generateXmlFromStateExported();
+        sendAction({
+          type: "SYNC_PATTERN_STATE",
+          xml,
+        });
+      }
+
+      saveStateToSession();
+      break;
+    }
+
    case "STOP_PLAYBACK": {
      setTimeout(stopPlayback, delayMs);
      const who = actorOf(action);
@@ -551,9 +585,6 @@ async function handleActionBroadcast(action) {
      );
      break;

-    // =================================================================
-    // 👇 INÍCIO DA CORREÇÃO (Handlers Sincronia de Loop/Seek/SyncMode)
-    // =================================================================
    case "SET_LOOP_STATE": {
      const changed =
        appState.global.isLoopActive !== !!action.isLoopActive ||
@@ -614,9 +645,6 @@ async function handleActionBroadcast(action) {
      saveStateToSession();
      break;
    }
-    // =================================================================
-    // 👆 FIM DA CORREÇÃO
-    // =================================================================

    // Estado Global
    case "LOAD_PROJECT": //
@@ -647,17 +675,22 @@ async function handleActionBroadcast(action) {
      isLoadingProject = false;
      break;

-    case "SYNC_PATTERN_STATE": //
-      // Esta ação agora só será recebida de *outros* usuários,
-      // ou quando o servidor enviar, não de você mesmo.
-      try {
-        await parseMmpContent(action.xml); //
-        renderAll();
-        saveStateToSession(); //
-        console.log("Socket: Pattern state sincronizado.");
-      } catch (e) {
-        console.error("Erro SYNC_PATTERN_STATE:", e);
-        showToast("❌ Erro sync pattern", "error");
+    case "SYNC_PATTERN_STATE": 
+      // 🔥 CORREÇÃO CRÍTICA:
+      // Esta ação serve apenas para o SERVIDOR atualizar o arquivo .json no disco.
+      // Os clientes online NÃO devem recarregar o XML, pois eles já atualizaram 
+      // o estado via ações atômicas (TOGGLE_NOTE, ADD_TRACK, etc).
+      // Recarregar aqui causa o "resetProjectState" que mata o áudio.
+      
+      console.log("Socket: XML salvo no servidor (Sync silencioso).");
+      
+      // Se quiser garantir, salvamos apenas na sessão local do navegador
+      // sem mexer na engine de áudio ou na tela.
+      if (action.xml) {
+          // Atualiza apenas a string do XML na memória global para referência futura
+          const parser = new DOMParser();
+          appState.global.originalXmlDoc = parser.parseFromString(action.xml, "application/xml");
+          saveStateToSession(); 
      }
      break;

@@ -713,17 +746,55 @@ async function handleActionBroadcast(action) {
      renderPatternEditor();
      const who = actorOf(action);
      showToast(`🥁 Faixa add por ${who}`, "info");
-      // Salva o estado localmente também!
+      
+      // 🔥 CORREÇÃO: Avisa o servidor que o XML mudou!
+      const isFromSelf = action.__senderId === socket.id;
+      if (window.ROOM_NAME && isFromSelf) {
+          const xml = generateXmlFromStateExported();
+          sendAction({ type: "SYNC_PATTERN_STATE", xml });
+      }
+
      saveStateToSession();
      break;
    }

+    case "REMOVE_TRACK_BY_ID": {
+      const { trackId } = action;
+      const removed = removeTrackById(trackId); // Tenta remover pelo ID seguro
+      
+      if (removed) {
+        renderPatternEditor();
+        const who = actorOf(action);
+        showToast(`❌ Faixa removida por ${who}`, "warning");
+
+        // Sincroniza o XML com o servidor para persistir a remoção
+        const isFromSelf = action.__senderId === socket.id;
+        if (window.ROOM_NAME && isFromSelf) {
+            // Importante: gerar o XML atualizado (sem a faixa)
+            const xml = generateXmlFromStateExported();
+            sendAction({ type: "SYNC_PATTERN_STATE", xml });
+        }
+        saveStateToSession();
+      } else {
+        console.warn(`Tentativa de remover track inexistente/fantasma: ${trackId}`);
+        // Não faz nada, protegendo as faixas locais!
+      }
+      break;
+    }
+
    case "REMOVE_LAST_TRACK": {
      removeLastTrackFromState();
      renderPatternEditor();
      const who = actorOf(action);
      showToast(`❌ Faixa remov. por ${who}`, "warning");
-      // Salva o estado localmente também!
+      
+      // 🔥 CORREÇÃO: Avisa o servidor que o XML mudou (removeu o TripleOscillator, por exemplo)
+      const isFromSelf = action.__senderId === socket.id;
+      if (window.ROOM_NAME && isFromSelf) {
+          const xml = generateXmlFromStateExported();
+          sendAction({ type: "SYNC_PATTERN_STATE", xml });
+      }
+
      saveStateToSession();
      break;
    }
@@ -751,6 +822,31 @@ async function handleActionBroadcast(action) {
      break;
    }

+    case "REMOVE_LAST_AUDIO_LANE": {
+      // 1. Verifica se tem tracks
+      if (appState.audio.tracks.length === 0) break;
+
+      // 2. Pega a última track
+      const lastTrack = appState.audio.tracks.pop();
+
+      // 3. Remove os clips associados a essa track (Limpeza)
+      if (lastTrack && lastTrack.id) {
+         // Filtra mantendo apenas os clips que NÃO pertencem à track removida
+         appState.audio.clips = appState.audio.clips.filter(clip => clip.trackId !== lastTrack.id);
+      }
+
+      // 4. Atualiza a tela
+      renderAll();
+      
+      // 5. Notifica
+      const who = actorOf(action);
+      showToast(`🗑️ Pista de áudio removida por ${who}`, "error");
+      
+      // 6. Salva sessão
+      saveStateToSession();
+      break;
+    }
+
    case "REMOVE_AUDIO_CLIP":
      if (removeAudioClip(action.clipId)) {
        appState.global.selectedClipId = null;
@@ -887,47 +983,32 @@ async function handleActionBroadcast(action) {

    // Snapshots
    case "AUDIO_SNAPSHOT_REQUEST": {
-      const clips = appState.audio?.clips?.length || 0,
-        tracks = appState.audio?.tracks?.length || 0;
-      const iHave = clips > 0 || tracks > 0;
-      if (!iHave || isFromSelf) break;
-      if (!window.__lastSnapshotSentAt) window.__lastSnapshotSentAt = 0;
-      const now = Date.now();
-      if (now - window.__lastSnapshotSentAt < 1500) break;
-      window.__lastSnapshotSentAt = now;
-      try {
-        const snap = getAudioSnapshot();
-        sendAction({
-          type: "AUDIO_SNAPSHOT",
-          snapshot: snap,
-          __target: action.__senderId,
-        });
-      } catch (e) {
-        console.warn("Erro AUDIO_SNAPSHOT_REQUEST:", e);
-      }
-      // Salva o estado localmente também!
-      saveStateToSession();
+      // 🛑 BLOQUEADO: Agora o Servidor (backend) é quem manda o snapshot autoritativo.
+      // Se deixarmos os clientes responderem, eles vão enviar estados antigos ("zumbis").
+      console.log("Socket: Ignorando pedido de snapshot (Server Authoritative Mode).");
      break;
    }

    case "AUDIO_SNAPSHOT": {
      if (action.__target && action.__target !== socket.id) break;
-      if (appState.global.justReset) {
-        console.warn("Socket: Snapshot de áudio ignorado (justReset=true).");
-        break; // Ignora o snapshot
-      }
-      const hasClips = (appState.audio?.clips?.length || 0) > 0;
-      if (hasClips) break;
+      
+      // Removemos a verificação "if (hasClips) break" que impedia
+      // de carregar um estado vazio se o local já tivesse algo (como as faixas zumbis).
+      
      try {
+        console.log("Socket: Aplicando Snapshot de Áudio Autoritativo...");
        await applyAudioSnapshot(action.snapshot);
        renderAll();
+        
        const who = actorOf(action);
-        showToast(`🔁 Sync áudio por ${who}`, "success");
+        // Só mostra toast se realmente tiver conteúdo, para não spammar na entrada
+        if ((action.snapshot?.tracks?.length || 0) > 0) {
+            showToast(`🔁 Sync áudio por ${who}`, "success");
+        }
      } catch (e) {
        console.error("Erro AUDIO_SNAPSHOT:", e);
-        showToast("❌ Erro sync áudio", "error");
      }
-      // Salva o estado localmente também!
+      // Salva o estado localmente (mesmo que seja vazio!)
      saveStateToSession();
      break;
    }
@@ -1016,6 +1097,32 @@ async function handleActionBroadcast(action) {
      break;
    }

+    case "REMOVE_AUDIO_LANE_BY_ID": { //
+      const { trackId } = action;
+      
+      // 1. Encontra o índice da faixa com esse ID específico
+      const trackIndex = appState.audio.tracks.findIndex(t => t.id === trackId);
+      
+      if (trackIndex !== -1) {
+          // 2. Remove a faixa exata do array local
+          appState.audio.tracks.splice(trackIndex, 1);
+          
+          // 3. Remove os clips associados a este ID (Limpeza local)
+          appState.audio.clips = appState.audio.clips.filter(c => c.trackId !== trackId);
+          
+          renderAll(); // Atualiza a tela
+          
+          const who = actorOf(action);
+          // showToast(`🗑️ Pista removida por ${who}`, "warning");
+          
+          // 4. Salva a sessão para garantir persistência no F5 local
+          saveStateToSession(); 
+      } else {
+          console.warn(`Tentativa de remover track inexistente: ${trackId}`);
+      }
+      break;
+    }
+
    default:
      console.warn("Ação desconhecida:", action.type);
  }
@@ -2,6 +2,86 @@
 import { appState } from './state.js';
 import { PIXELS_PER_STEP, ZOOM_LEVELS } from './config.js';

+export const DEFAULT_PROJECT_XML = `<?xml version="1.0"?>
+                                <!DOCTYPE lmms-project>
+                                <lmms-project version="1.0" type="song" creatorversion="1.2.2" creator="LMMS">
+                                  <head mastervol="100" masterpitch="0" timesig_denominator="4" timesig_numerator="4" bpm="140"/>
+                                  <song>
+                                    <trackcontainer visible="1" y="5" minimized="0" height="300" type="song" x="5" maximized="0" width="600">
+                                      <track muted="0" name="TripleOscillator" type="0" solo="0">
+                                        <instrumenttrack pitchrange="1" fxch="0" usemasterpitch="1" vol="100" pitch="0" pan="0" basenote="57">
+                                          <instrument name="tripleoscillator">
+                                            <tripleoscillator wavetype1="0" pan2="0" finer1="0" finel1="0" userwavefile0="" wavetype0="0" userwavefile1="" finer0="0" stphdetun1="0" vol0="33" wavetype2="0" coarse0="0" finel2="0" finer2="0" modalgo2="2" finel0="0" coarse1="-12" phoffset1="0" pan0="0" modalgo3="2" coarse2="-24" phoffset2="0" pan1="0" vol1="33" phoffset0="0" stphdetun0="0" modalgo1="2" vol2="33" stphdetun2="0" userwavefile2=""/>
+                                          </instrument>
+                                          <eldata fres="0.5" fwet="0" ftype="0" fcut="14000">
+                                            <elvol ctlenvamt="0" lspd_syncmode="0" x100="0" lpdel="0" latt="0" pdel="0" lspd="0.1" lshp="0" hold="0.5" lspd_numerator="4" userwavefile="" att="0" lamt="0" dec="0.5" lspd_denominator="4" sustain="0.5" rel="0.1" amt="0"/>
+                                            <elcut ctlenvamt="0" lspd_syncmode="0" x100="0" lpdel="0" latt="0" pdel="0" lspd="0.1" lshp="0" hold="0.5" lspd_numerator="4" userwavefile="" att="0" lamt="0" dec="0.5" lspd_denominator="4" sustain="0.5" rel="0.1" amt="0"/>
+                                            <elres ctlenvamt="0" lspd_syncmode="0" x100="0" lpdel="0" latt="0" pdel="0" lspd="0.1" lshp="0" hold="0.5" lspd_numerator="4" userwavefile="" att="0" lamt="0" dec="0.5" lspd_denominator="4" sustain="0.5" rel="0.1" amt="0"/>
+                                          </eldata>
+                                          <chordcreator chordrange="1" chord-enabled="0" chord="0"/>
+                                          <arpeggiator arpcycle="0" arptime_denominator="4" arpgate="100" arpdir="0" arpmode="0" arptime_syncmode="0" arp="0" arpmiss="0" arp-enabled="0" arptime="100" arprange="1" arpskip="0" arptime_numerator="4"/>
+                                          <midiport inputchannel="0" outputcontroller="0" fixedoutputvelocity="-1" outputchannel="1" fixedinputvelocity="-1" outputprogram="1" inputcontroller="0" readable="0" fixedoutputnote="-1" basevelocity="63" writable="0"/>
+                                          <fxchain enabled="0" numofeffects="0"/>
+                                        </instrumenttrack>
+                                      </track>
+                                      <track muted="0" name="Sample track" type="2" solo="0">
+                                        <sampletrack vol="100" pan="0">
+                                          <fxchain enabled="0" numofeffects="0"/>
+                                        </sampletrack>
+                                      </track>
+                                      <track muted="0" name="Beat/Bassline 0" type="1" solo="0">
+                                        <bbtrack>
+                                          <trackcontainer visible="0" y="5" minimized="0" height="400" type="bbtrackcontainer" x="610" maximized="0" width="700">
+                                            <track muted="0" name="Kicker" type="0" solo="0">
+                                              <instrumenttrack pitchrange="1" fxch="0" usemasterpitch="1" vol="100" pitch="0" pan="0" basenote="57">
+                                                <instrument name="kicker">
+                                                  <kicker decay="440" version="1" noise="0" endfreq="40" decay_syncmode="0" decay_denominator="4" startfreq="150" env="0.163" startnote="1" dist="0.8" slope="0.06" decay_numerator="4" click="0.4" distend="0.8" gain="1" endnote="0"/>
+                                                </instrument>
+                                                <eldata fres="0.5" fwet="0" ftype="0" fcut="14000">
+                                                  <elvol ctlenvamt="0" lspd_syncmode="0" x100="0" lpdel="0" latt="0" pdel="0" lspd="0.1" lshp="0" hold="0.5" lspd_numerator="4" userwavefile="" att="0" lamt="0" dec="0.5" lspd_denominator="4" sustain="0.5" rel="0.1" amt="0"/>
+                                                  <elcut ctlenvamt="0" lspd_syncmode="0" x100="0" lpdel="0" latt="0" pdel="0" lspd="0.1" lshp="0" hold="0.5" lspd_numerator="4" userwavefile="" att="0" lamt="0" dec="0.5" lspd_denominator="4" sustain="0.5" rel="0.1" amt="0"/>
+                                                  <elres ctlenvamt="0" lspd_syncmode="0" x100="0" lpdel="0" latt="0" pdel="0" lspd="0.1" lshp="0" hold="0.5" lspd_numerator="4" userwavefile="" att="0" lamt="0" dec="0.5" lspd_denominator="4" sustain="0.5" rel="0.1" amt="0"/>
+                                                </eldata>
+                                                <chordcreator chordrange="1" chord-enabled="0" chord="0"/>
+                                                <arpeggiator arpcycle="0" arptime_denominator="4" arpgate="100" arpdir="0" arpmode="0" arptime_syncmode="0" arp="0" arpmiss="0" arp-enabled="0" arptime="100" arprange="1" arpskip="0" arptime_numerator="4"/>
+                                                <midiport inputchannel="0" outputcontroller="0" fixedoutputvelocity="-1" outputchannel="1" fixedinputvelocity="-1" outputprogram="1" inputcontroller="0" readable="0" fixedoutputnote="-1" basevelocity="63" writable="0"/>
+                                                <fxchain enabled="0" numofeffects="0"/>
+                                              </instrumenttrack>
+                                              <pattern pos="0" muted="0" name="Kicker" steps="16" type="0"/>
+                                            </track>
+                                          </trackcontainer>
+                                        </bbtrack>
+                                      </track>
+                                      <track muted="0" name="Automation track" type="5" solo="0">
+                                        <automationtrack/>
+                                      </track>
+                                    </trackcontainer>
+                                    <track muted="0" name="Automation track" type="6" solo="0">
+                                      <automationtrack/>
+                                      <automationpattern pos="0" len="192" name="Numerator" prog="0" tens="1" mute="0"/>
+                                      <automationpattern pos="0" len="192" name="Denominator" prog="0" tens="1" mute="0"/>
+                                      <automationpattern pos="0" len="192" name="Tempo" prog="0" tens="1" mute="0"/>
+                                      <automationpattern pos="0" len="192" name="Master volume" prog="0" tens="1" mute="0"/>
+                                      <automationpattern pos="0" len="192" name="Master pitch" prog="0" tens="1" mute="0"/>
+                                    </track>
+                                    <fxmixer visible="1" y="310" minimized="0" height="333" x="5" maximized="0" width="543">
+                                      <fxchannel volume="1" muted="0" num="0" name="Master" soloed="0">
+                                        <fxchain enabled="0" numofeffects="0"/>
+                                      </fxchannel>
+                                    </fxmixer>
+                                    <ControllerRackView visible="1" y="310" minimized="0" height="200" x="680" maximized="0" width="350"/>
+                                    <pianoroll visible="0" y="5" minimized="0" height="480" x="5" maximized="0" width="860"/>
+                                    <automationeditor visible="0" y="1" minimized="0" height="400" x="1" maximized="0" width="860"/>
+                                    <projectnotes visible="0" y="10" minimized="0" height="400" x="700" maximized="0" width="679"><![CDATA[<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
+                                <html><head><meta name="qrichtext" content="1" /><style type="text/css">
+                                p, li { white-space: pre-wrap; }
+                                </style></head><body style=" font-family:'MS Shell Dlg 2'; font-size:7.5pt; font-weight:400; font-style:normal;">
+                                <p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><br /></p></body></html>]]></projectnotes>
+                                    <timeline lp1pos="192" lpstate="0" lp0pos="0"/>
+                                    <controllers/>
+                                  </song>
+                                </lmms-project>`;
+
 /**
 * Helper interna para ler o BPM do input.
 * @returns {number} O BPM atual.