117 lines
2.8 KiB
JavaScript
117 lines
2.8 KiB
JavaScript
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var Sound = {
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bus: {},
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samplerate() { return cmd(198); },
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sounds: [], /* array of loaded sound files */
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play(file, bus) {
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if (!IO.exists(file)) {
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Log.error(`Cannot play sound ${file}: does not exist.`);
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return;
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}
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var src = DSP.source(file);
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bus ??= Sound.bus.master;
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src.plugin(bus);
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return src;
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},
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};
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var DSP = {
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mix(to) {
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var n = cmd(181);
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if (to) n.plugin(to);
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return n;
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},
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source(path) {
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return cmd(182,path);
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},
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delay(secs,decay) {
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return cmd(185, secs, decay);
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},
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fwd_delay(secs, decay) {
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return cmd(207,secs,decay);
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},
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allpass(secs, decay) {
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var composite = {};
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var fwd = DSP.fwd_delay(secs,-decay);
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var fbk = 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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lpf(f) {
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return cmd(186,f);
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},
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hpf(f) {
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return cmd(187,f);
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},
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mod(path) {
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return cmd(188,path);
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},
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midi(midi,sf) {
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return cmd(206,midi,sf);
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},
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crush(rate, depth) {
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return cmd(189,rate,depth);
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},
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compressor() {
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return cmd(190);
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},
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limiter(ceil) {
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return cmd(191,ceil);
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},
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noise_gate(floor) {
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return cmd(192,floor);
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},
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pitchshift(octaves) {
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return cmd(200,octaves);
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},
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noise() {
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return cmd(203);
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},
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pink() {
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return cmd(204);
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},
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red() {
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return cmd(205);
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},
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};
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Sound.bus.master = cmd(180);
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Sound.master = Sound.bus.master;
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Sound.play.doc = "Play the given file once.";
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Sound.doc = {};
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Sound.doc.volume = "Set the master volume. 0 is no sound and 100 is loudest.";
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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(cmd(180).__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(DSP.source().__proto__, {
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frames() { return cmd(197,this); },
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length() { return this.frames()/Sound.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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