add .tone + helpers

repl/src/tonal.ts

@@ -62,7 +62,8 @@ function scaleTranspose(scale: string, offset: number, note: string) {
 Pattern.prototype._mapNotes = function (func: (note: NoteEvent) => NoteEvent) {
   return this.fmap((event: string | NoteEvent) => {
     const noteEvent = toNoteEvent(event);
-    return func(noteEvent);
+    // TODO: generalize? this is practical for any event that is expected to be an object with
+    return { ...noteEvent, ...func(noteEvent) }; 
   });
 };
 

repl/src/tone.ts

@@ -1,8 +1,98 @@
 import { Pattern as _Pattern } from '../../strudel.mjs';
-import { AutoFilter, Destination, Filter, Gain, isNote, Synth } from 'tone';
+import { AutoFilter, Destination, Filter, Gain, isNote, Synth, PolySynth } from 'tone';
 
 const Pattern = _Pattern as any;
 
+// with this function, you can play the pattern with any tone synth
+Pattern.prototype.tone = function (instrument) {
+  // instrument.toDestination();
+  return this.fmap((value: any) => {
+    value = typeof value !== 'object' && !Array.isArray(value) ? { value } : value;
+    const onTrigger = (time, event) => {
+      if (instrument.constructor.name === 'PluckSynth') {
+        instrument.triggerAttack(value.value, time);
+      } else if (instrument.constructor.name === 'NoiseSynth') {
+        instrument.triggerAttackRelease(event.duration, time); // noise has no value
+      } else {
+        instrument.triggerAttackRelease(value.value, event.duration, time);
+      }
+    };
+    return { ...value, instrument, onTrigger };
+  });
+};
+
+Pattern.prototype.define('tone', (type, pat) => pat.tone(type), { composable: true, patternified: false });
+
+// helpers
+
+export const vol = (v) => new Gain(v);
+export const lowpass = (v) => new Filter(v, 'lowpass');
+export const highpass = (v) => new Filter(v, 'highpass');
+export const adsr = (a, d = 0.1, s = 0.4, r = 0.01) => ({ envelope: { attack: a, decay: d, sustain: s, release: r } });
+export const osc = (type) => ({ oscillator: { type } });
+export const out = Destination;
+
+/*
+
+You are entering experimental zone
+
+*/
+
+// the following code is an attempt to minimize tonejs code.. it is still an experiment
+
+const chainable = function (instr) {
+  const _chain = instr.chain.bind(instr);
+  let chained: any = [];
+  instr.chain = (...args) => {
+    chained = chained.concat(args);
+    instr.disconnect(); // disconnect from destination / previous chain
+    return _chain(...chained, Destination);
+  };
+  // shortcuts: chaining multiple won't work forn now.. like filter(1000).gain(0.5). use chain + native Tone calls instead
+  instr.filter = (freq = 1000, type: BiquadFilterType = 'lowpass') =>
+    instr.chain(
+      new Filter(freq, type) // .Q.setValueAtTime(q, time);
+    );
+  instr.gain = (gain: number = 0.9) => instr.chain(new Gain(gain));
+  return instr;
+};
+
+// helpers
+export const poly = (type) => {
+  const s: any = new PolySynth(Synth, { oscillator: { type } }).toDestination();
+  return chainable(s);
+};
+
+Pattern.prototype._poly = function (type: any = 'triangle') {
+  const instrumentConfig: any = {
+    oscillator: { type },
+    envelope: { attack: 0.01, decay: 0.01, sustain: 0.6, release: 0.01 },
+  };
+  if (!this.instrument) {
+    // create only once to keep the js heap happy
+    // this.instrument = new PolySynth(Synth, instrumentConfig).toDestination();
+    this.instrument = poly(type);
+  }
+  return this.fmap((value: any) => {
+    value = typeof value !== 'object' && !Array.isArray(value) ? { value } : value;
+    const onTrigger = (time, event) => {
+      this.instrument.set(instrumentConfig);
+      this.instrument.triggerAttackRelease(value.value, event.duration, time);
+    };
+    return { ...value, instrumentConfig, onTrigger };
+  });
+};
+
+Pattern.prototype.define('poly', (type, pat) => pat.poly(type), { composable: true, patternified: true });
+
+/*
+
+You are entering danger zone
+
+*/
+
+// everything below is nice in theory, but not healthy for the JS heap, as nodes get recreated on every call
+
 const getTrigger = (getChain: any, value: any) => (time: number, event: any) => {
   const chain = getChain(); // make sure this returns a node that is connected toDestination // time
   if (!isNote(value)) {
@@ -88,8 +178,6 @@ Pattern.prototype.autofilter = function (g: number) {
   return this.chain(autofilter(g));
 };
 
-Pattern.prototype.patternified = Pattern.prototype.patternified.concat(['synth', 'gain', 'filter']);
-
 Pattern.prototype.define('synth', (type, pat) => pat.synth(type), { composable: true, patternified: true });
 Pattern.prototype.define('gain', (gain, pat) => pat.synth(gain), { composable: true, patternified: true });
 Pattern.prototype.define('filter', (cutoff, pat) => pat.filter(cutoff), { composable: true, patternified: true });