Initial commit

tools/generate_audio.py

@@ -0,0 +1,38 @@
+"""Generate original mono PCM effects using only the Python standard library.
+Python is a development convenience; it is never needed to play the game.
+"""
+from pathlib import Path
+import math
+import struct
+import wave
+
+ROOT = Path(__file__).resolve().parents[1] / "assets" / "audio"
+CUES = {
+    "pellet": ([880, 1320], 0.035),
+    "power": ([330, 440, 660, 880], 0.09),
+    "frightened": ([165, 220, 165], 0.10),
+    "defeated": ([660, 880, 1320], 0.07),
+    "death": ([660, 550, 440, 330, 165], 0.12),
+    "victory": ([440, 554.37, 659.25, 880, 659.25, 880], 0.16),
+    "game_over": ([330, 293.66, 261.63, 164.81], 0.22),
+}
+
+def main():
+    ROOT.mkdir(parents=True, exist_ok=True)
+    rate = 22050
+    for name, (notes, duration) in CUES.items():
+        samples = bytearray()
+        for frequency in notes:
+            count = int(rate * duration)
+            for i in range(count):
+                envelope = min(i / (rate * 0.005), 1) * (1 - i / count) ** 1.5
+                tone = math.sin(2 * math.pi * frequency * i / rate)
+                samples.extend(struct.pack("<h", int(tone * envelope * 6500)))
+        with wave.open(str(ROOT / f"{name}.wav"), "wb") as output:
+            output.setnchannels(1)
+            output.setsampwidth(2)
+            output.setframerate(rate)
+            output.writeframes(samples)
+
+if __name__ == "__main__":
+    main()