Aliens vs Predator Atari Jaguar ROM audio extractor

avp_audio_extractor.py

import wave
import struct

# Load audio bytes from ROM
rom_bytes = bytearray()
with open("Alien vs Predator (1994).jag", "rb") as rom_file:
    rom_file.seek(1488614, 0)
    rom_bytes += bytearray(rom_file.read(1596322))


# Convert samples
samples = bytearray(len(rom_bytes) * 2)

for i, value in enumerate(rom_bytes):

    if value < 128:
        value *= value
    else:
        value -= 128
        value *= -value

    struct.pack_into('<h', samples, 2*i, value)


# Save the output WAV file
with wave.open("output.wav", "wb") as wav_file:
    wav_file.setsampwidth(2)
    wav_file.setnchannels(1)
    wav_file.setframerate(8000)
    wav_file.setnframes(len(samples))
    wav_file.writeframes(samples)