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