melhorando a leitura de projetos no mmpCreator

assets/js/creations/file.js

@@ -45,12 +45,12 @@ function resolveSamplePath(sampleName, pathMap) {
   return null;
 }
 
-// helper: LMMS ticks -> seconds (1 beat = 192 ticks)
-function ticksToSeconds(ticks, bpm) {
-  seconds = (ticks / 12) * getSecondsPerStep()
+function ticksToSeconds(ticks) {
+  const seconds = (ticks / TICKS_PER_STEP) * getSecondsPerStep();
   return seconds;
 }
 
+
 export async function parseBeatIndexJson(data) {
   resetProjectState();
   initializeAudioContext();
@@ -263,9 +263,9 @@ function parseInstrumentNode(
       const patternSteps = parseInt(patternNode.getAttribute("steps"), 10) || 16;
       const steps = new Array(patternSteps).fill(false);
       const notes = [];
-
-      // Constante de conversão LMMS (192 ticks = 1 beat, 48 ticks = 1 step)
-      const ticksPerStep = 48;
+      // No XML base: 1 compasso (bar) = 192 ticks em 4/4,
+      // então 1 beat = 48 ticks e 1 step (1/16) = 12 ticks.
+      const ticksPerStep = 12; 
 
       patternNode.querySelectorAll("note").forEach((noteNode) => {
         const pos = parseInt(noteNode.getAttribute("pos"), 10);
@@ -277,14 +277,9 @@ function parseInstrumentNode(
         notes.push({ pos, len, key, vol, pan });
 
         // Calcula qual step acender
-        // Nota: B/B Editor no LMMS geralmente usa notas de len=48. 
-        // Se a nota for longa, isso marca apenas o step de início.
-        const stepIndex = Math.round(pos / ticksPerStep);
-        
-        if (stepIndex >= 0 && stepIndex < patternSteps) {
-          steps[stepIndex] = true;
-        }
-      });
+        const stepIndex = Math.floor(pos / ticksPerStep);
+        if (stepIndex < patternSteps) steps[stepIndex] = true;
+     });
 
       return {
         name: patternName,
@@ -608,7 +603,7 @@ export function syncPatternStateToServer() {
 function createTrackXml(track) {
   if (!track.patterns || track.patterns.length === 0) return "";
 
-  const ticksPerStep = 48; // Sincronizado com o parsing
+  const ticksPerStep = 12; // 1 step (1/16) no LMMS = 12 ticks (com bar=192 em 4/4)
   const lmmsVolume = Math.round(track.volume * 100);
   const lmmsPan = Math.round(track.pan * 100);