68 lines
1.9 KiB
JavaScript
68 lines
1.9 KiB
JavaScript
var audio = {};
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audio.samplerate = dspsound.samplerate();
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audio.play = function(file,bus) {
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bus ??= audio.bus.master;
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file = Resources.find_sound(file);
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if (!file) {
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console.error(`Cannot play sound ${file}: does not exist.`);
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return;
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}
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var src = audio.dsp.source(file);
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src.plugin(bus);
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return src;
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}
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audio.bus = {};
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audio.bus.master = dspsound.master();
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audio.dsp = {};
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audio.dsp = dspsound;
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audio.dsp.mix = function(to) {
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var n = audio.dsp.mix();
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if (to) n.plugin(to);
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return n;
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};
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audio.dsp.allpass = function(secs, decay) {
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var composite = {};
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var fwd = audio.dsp.fwd_delay(secs,-decay);
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var fbk = audio.dsp.delay(secs,decay);
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composite.id = fwd.id;
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composite.plugin = composite.plugin.bind(fbk);
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composite.unplug = dsp_node.unplug.bind(fbk);
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fwd.plugin(fbk);
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return composite;
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}
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audio.dsp.doc = {
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delay: "Delays the input by secs, multiplied by decay",
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fwd_delay: "Forward feedback delays the input by secs, multiplied by decay",
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allpass: "Composite node of a delay and fwd_delay",
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lpf: "Low pass filter at a given frequency",
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hpf: "High pass filter at a given frequency",
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midi: "A source node for a midi file with a given soundfont file",
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crush: "Bitcrush the input to a given rate and bit depth",
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limiter: "Limit audio to ceil with pleasent rolloff",
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noise_gate: "Do not pass audio below the given floor",
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pitchshift: "Shift sound by octaves",
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noise: "Plain randon noise",
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pink: "Pink noise",
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red: "Red noise"
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};
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Object.mixin(audio.bus.master.__proto__, {
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get db() { return 20*Math.log10(Math.abs(this.volume)); },
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set db(x) { x = Math.clamp(x,-100,0); this.volume = Math.pow(10, x/20); },
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get volume() { return this.gain; },
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set volume(x) { this.gain = x; },
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});
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/*Object.mixin(audio.dsp.source().__proto__, {
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length() { return this.frames()/audio.samplerate(); },
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time() { return this.frame/sound.samplerate(); },
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pct() { return this.time()/this.length(); },
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});
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*/
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return {audio};
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