rename more stuff + pull out fork

packages/superdough/zzfx_fork.mjs

@@ -0,0 +1,118 @@
+// https://github.com/KilledByAPixel/ZzFX/blob/master/ZzFX.js#L85C5-L180C6
+// changes: replaced this.volume with 1 + using sampleRate from getAudioContext()
+export function buildSamples(
+  volume = 1,
+  randomness = 0.05,
+  frequency = 220,
+  attack = 0,
+  sustain = 0,
+  release = 0.1,
+  shape = 0,
+  shapeCurve = 1,
+  slide = 0,
+  deltaSlide = 0,
+  pitchJump = 0,
+  pitchJumpTime = 0,
+  repeatTime = 0,
+  noise = 0,
+  modulation = 0,
+  bitCrush = 0,
+  delay = 0,
+  sustainVolume = 1,
+  decay = 0,
+  tremolo = 0,
+) {
+  // init parameters
+  let PI2 = Math.PI * 2,
+    sampleRate = getAudioContext().sampleRate,
+    sign = (v) => (v > 0 ? 1 : -1),
+    startSlide = (slide *= (500 * PI2) / sampleRate / sampleRate),
+    startFrequency = (frequency *= ((1 + randomness * 2 * Math.random() - randomness) * PI2) / sampleRate),
+    b = [],
+    t = 0,
+    tm = 0,
+    i = 0,
+    j = 1,
+    r = 0,
+    c = 0,
+    s = 0,
+    f,
+    length;
+
+  // scale by sample rate
+  attack = attack * sampleRate + 9; // minimum attack to prevent pop
+  decay *= sampleRate;
+  sustain *= sampleRate;
+  release *= sampleRate;
+  delay *= sampleRate;
+  deltaSlide *= (500 * PI2) / sampleRate ** 3;
+  modulation *= PI2 / sampleRate;
+  pitchJump *= PI2 / sampleRate;
+  pitchJumpTime *= sampleRate;
+  repeatTime = (repeatTime * sampleRate) | 0;
+
+  // generate waveform
+  for (length = (attack + decay + sustain + release + delay) | 0; i < length; b[i++] = s) {
+    if (!(++c % ((bitCrush * 100) | 0))) {
+      // bit crush
+      s = shape
+        ? shape > 1
+          ? shape > 2
+            ? shape > 3 // wave shape
+              ? Math.sin((t % PI2) ** 3) // 4 noise
+              : Math.max(Math.min(Math.tan(t), 1), -1) // 3 tan
+            : 1 - (((((2 * t) / PI2) % 2) + 2) % 2) // 2 saw
+          : 1 - 4 * Math.abs(Math.round(t / PI2) - t / PI2) // 1 triangle
+        : Math.sin(t); // 0 sin
+
+      s =
+        (repeatTime
+          ? 1 - tremolo + tremolo * Math.sin((PI2 * i) / repeatTime) // tremolo
+          : 1) *
+        sign(s) *
+        Math.abs(s) ** shapeCurve * // curve 0=square, 2=pointy
+        volume *
+        1 * // envelope
+        (i < attack
+          ? i / attack // attack
+          : i < attack + decay // decay
+          ? 1 - ((i - attack) / decay) * (1 - sustainVolume) // decay falloff
+          : i < attack + decay + sustain // sustain
+          ? sustainVolume // sustain volume
+          : i < length - delay // release
+          ? ((length - i - delay) / release) * // release falloff
+            sustainVolume // release volume
+          : 0); // post release
+
+      s = delay
+        ? s / 2 +
+          (delay > i
+            ? 0 // delay
+            : ((i < length - delay ? 1 : (length - i) / delay) * // release delay
+                b[(i - delay) | 0]) /
+              2)
+        : s; // sample delay
+    }
+
+    f =
+      (frequency += slide += deltaSlide) * // frequency
+      Math.cos(modulation * tm++); // modulation
+    t += f - f * noise * (1 - (((Math.sin(i) + 1) * 1e9) % 2)); // noise
+
+    if (j && ++j > pitchJumpTime) {
+      // pitch jump
+      frequency += pitchJump; // apply pitch jump
+      startFrequency += pitchJump; // also apply to start
+      j = 0; // stop pitch jump time
+    }
+
+    if (repeatTime && !(++r % repeatTime)) {
+      // repeat
+      frequency = startFrequency; // reset frequency
+      slide = startSlide; // reset slide
+      j ||= 1; // reset pitch jump time
+    }
+  }
+
+  return b;
+}