Just an experimemt with sound. Produces a sound similar to used in old games. Formula: 10 * sqrt(x)
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"""Formula used: Frequency / Sample_rate * 10 * math.sqrt(x) | |
x is [0, Duration * Sample_rate) | |
""" | |
import wave | |
import struct | |
import math | |
def fpart(val): | |
"""Returns fractional part of the number""" | |
return val - int(val) | |
class Sound(): | |
def __init__(self, frequency, duration, volume=1, channels=1): | |
self.volume = volume * (2 ** 15 - 1) | |
self.frequency = frequency | |
self.channels = channels | |
self.duration = duration | |
SAMPLE_RATE = 44100 | |
BYTES_PER_FRAME = 2 | |
def main(): | |
s = Sound(8_000, 2) | |
fconst = s.frequency / Sound.SAMPLE_RATE | |
# Init code | |
f = wave.open("test.wav", "wb") | |
f.setnchannels(s.channels) | |
f.setsampwidth(Sound.BYTES_PER_FRAME) | |
f.setframerate(Sound.SAMPLE_RATE) | |
for x in range(int(s.duration * Sound.SAMPLE_RATE)): | |
value = int( | |
s.volume * fpart(fconst * 10 * math.sqrt(x)) | |
) | |
f.writeframesraw(struct.pack("<h", value)) | |
print(s.frequency) | |
f.writeframes(b"") | |
if __name__ == "__main__": | |
main() |
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