{
    "source": "JSON",
    "data": "BLOCK",
    "version": "0.0.1",
    "type": "javascript.MIDI.midi2freq",
    "language": "javascript",
    "extension": "webaudio",
    "help": "midi to freq",
    "label": "Midi 2 Freq",
    "color": "#24D3C1",
    "group": "MIDI",
    "codes": [
        {
            "name": "declaration",
            "code": "\n// block_$id$ = $label$\nvar $port[frequency]$ = [];\n\nvar $port[midi_value]$ = function(value){\n    value = (value < 0) ? 0 : value;\n    value = (value >127) ? 127 : value;\n    var arg = ((parseFloat(value) - 69.0) / 12.0);\n    result =  Math.pow(2.0, arg) * 440.0;\n    for (var i = 0; i < $port[frequency]$.length ; i++){\n        $port[frequency]$[i](result);\n    }\n    return true;\n    };\n"
        }
    ],
    "properties": [],
    "ports": [
        {
            "conn_type": "input",
            "name": "midi_value",
            "label": "Midi Value",
            "type": "javascript.float"
        },
        {
            "conn_type": "output",
            "name": "frequency",
            "label": "Frequency",
            "type": "javascript.float"
        }
    ]
}