Mercurial > boomslang
view tools/gen_sound.py @ 358:760f6a318d2e
Moved some widgets around.
author | Jeremy Thurgood <firxen@gmail.com> |
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date | Sat, 28 Aug 2010 16:50:37 +0200 |
parents | 913257638e6f |
children | 5b9f371c2bb8 |
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# Generate 'perfect' sine wave sounds # Design notes: produces ~= (use requested) s raw CDDA audio - 44100 Hz, 16 bit signed values # Input is freq in Hz - 440 for A, etc. - must be an integer # Output is written the file beep<freq>.pcm # Convert to ogg with oggenc -r <file> import sys import math import struct CDDA_RATE = 44100 MAX = 105*256 # Max value for sine wave def gen_sine(freq, secs): filename = 'beep%s.pcm' % freq # We need to generate freq cycles and sample that CDDA_RATE times samples_per_cycle = CDDA_RATE / freq data = [] for x in range(samples_per_cycle): rad = float(x) / samples_per_cycle * 2 * math.pi y = MAX * math.sin(rad) data.append(struct.pack('<i', y)) output = open(filename, 'w') for x in range(int(freq * secs)): output.write(''.join(data)) output.close() if __name__ == "__main__": freq = int(sys.argv[1]) if len(sys.argv) > 2: secs = float(sys.argv[2]) else: secs = 0.25 gen_sine(freq, secs)