Merge pull request #183 from tidalcycles/soundfont-file-support

Soundfont file support

packages/core/util.mjs

@@ -50,6 +50,9 @@ export const mod = (n, m) => ((n % m) + m) % m;
 
 export const getPlayableNoteValue = (hap) => {
   let { value: note, context } = hap;
+  if (typeof note === 'object' && !Array.isArray(note)) {
+    note = note.note || note.n || note.value;
+  }
   // if value is number => interpret as midi number as long as its not marked as frequency
   if (typeof note === 'number' && context.type !== 'frequency') {
     note = fromMidi(hap.value);

packages/soundfonts/index.mjs

@@ -1,6 +1,6 @@
 import { getFontBufferSource } from './fontloader.mjs';
 import * as soundfontList from './list.mjs';
+import { startPresetNote } from 'sfumato';
+import { loadSoundfont } from './sfumato.mjs';
 
-globalThis.getFontBufferSource = getFontBufferSource;
-globalThis.soundfontList = soundfontList;
-globalThis.soundfontList = soundfontList;
+export { loadSoundfont, startPresetNote, getFontBufferSource, soundfontList };

packages/soundfonts/package.json

@@ -23,7 +23,8 @@
   "homepage": "https://github.com/tidalcycles/strudel#readme",
   "dependencies": {
     "@strudel.cycles/core": "*",
-    "@strudel.cycles/webaudio": "^0.1.4"
+    "@strudel.cycles/webaudio": "^0.1.4",
+    "sfumato": "^0.1.2"
   },
   "devDependencies": {
     "node-fetch": "^3.2.6"

packages/soundfonts/sfumato.mjs

@@ -0,0 +1,24 @@
+import { Pattern } from '@strudel.cycles/core';
+import { loadSoundfont as _loadSoundfont, startPresetNote } from 'sfumato';
+
+Pattern.prototype.soundfont = function (sf, n = 0) {
+  return this.onTrigger((t, h, ct) => {
+    const ctx = getAudioContext();
+    const note = getPlayableNoteValue(h);
+    const preset = sf.presets[n % sf.presets.length];
+    const deadline = ctx.currentTime + t - ct;
+    const args = [ctx, preset, toMidi(note), deadline];
+    const stop = startPresetNote(...args);
+    stop(deadline + h.duration);
+  });
+};
+
+const soundfontCache = new Map();
+export function loadSoundfont(url) {
+  if (soundfontCache.get(url)) {
+    return soundfontCache.get(url);
+  }
+  const sf = _loadSoundfont(url);
+  soundfontCache.set(url, sf);
+  return sf;
+}