add node-web-audio-api variant

packages/node/node-web-audio-api.mjs

@@ -0,0 +1,64 @@
+import { createClock, evalScope } from '@strudel/core';
+import { evaluate } from '@strudel/transpiler';
+import watch from 'node-watch';
+import fs from 'node:fs/promises';
+import { AudioContext, OscillatorNode, GainNode } from 'node-web-audio-api';
+
+const audioContext = new AudioContext();
+
+let file = 'pattern.mjs';
+let pattern;
+async function evaluateFile() {
+  try {
+    console.log('// file evaluated:');
+    const code = await fs.readFile(file, { encoding: 'utf8' });
+    console.log(code);
+    const res = await evaluate(code);
+    pattern = res.pattern;
+  } catch (err) {
+    console.error(err);
+  }
+}
+
+// const getTime = () => performance.now() / 1000;
+const getTime = () => audioContext.currentTime;
+let minLatency = 50;
+async function main() {
+  await evalScope(import('@strudel/core'), import('@strudel/mini'), import('@strudel/tonal'));
+  await evaluateFile();
+  watch(file, { recursive: true }, () => evaluateFile());
+  let lastEnd;
+  const clock = createClock(getTime, (phase) => {
+    if (!lastEnd) {
+      lastEnd = phase;
+      return;
+    }
+    const haps = pattern.queryArc(lastEnd, phase);
+    lastEnd = phase;
+    const cps = 1;
+    const cycle = Math.floor(phase);
+    haps
+      .filter((h) => h.hasOnset())
+      .forEach((hap) => {
+        const env = new GainNode(audioContext, { gain: 0 });
+        const { attack = 0.01, gain = 1 } = hap.value;
+        env.connect(audioContext.destination);
+        const now = hap.whole.begin;
+        const duration = hap.duration;
+        env.gain
+          .setValueAtTime(0, now)
+          .linearRampToValueAtTime(gain * 0.2, now + attack)
+          .exponentialRampToValueAtTime(0.0001, now + duration);
+        const frequency = hap.value.freq;
+
+        const osc = new OscillatorNode(audioContext, { frequency });
+        osc.connect(env);
+        osc.start(now);
+        osc.stop(now + duration);
+      });
+  });
+
+  clock.start();
+}
+
+main();

packages/node/package.json

@@ -8,7 +8,8 @@
   },
   "main": "index.mjs",
   "scripts": {
-    "start": "node index.mjs"
+    "osc": "node osc-superdirt.mjs",
+    "waa": "node node-web-audio-api.mjs"
   },
   "keywords": [
     "tidalcycles",
@@ -25,11 +26,12 @@
   "homepage": "https://github.com/tidalcycles/strudel#readme",
   "dependencies": {
     "@strudel/core": "workspace:*",
+    "@strudel/mini": "workspace:*",
     "@strudel/osc": "workspace:*",
     "@strudel/tonal": "workspace:*",
-    "@strudel/mini": "workspace:*",
     "@strudel/transpiler": "workspace:*",
     "node-watch": "^0.7.4",
+    "node-web-audio-api": "^0.20.0",
     "osc-js": "^2.4.0"
   }
 }

packages/node/pattern.mjs

@@ -1,5 +1,2 @@
-stack(
-  s("bd*2"),
-  s("jvbass(3,8)"),
-  n(run(8)).s("feel").jux(rev).lpf(800)
-).hush()
+freq("110 220 [330 440,550,660]")
+.attack(.1).gain(.4)