47 lines
1.2 KiB
Python
Executable File
47 lines
1.2 KiB
Python
Executable File
#!/usr/bin/python
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import math
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import os
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import sys
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import time
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import pyaudio
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p = pyaudio.PyAudio()
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sample_rate=44100
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stream = p.open(
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format=pyaudio.paInt16,
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channels=1,
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rate=sample_rate,
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output=True
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)
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stream.start_stream()
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i = 1
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f = 0
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l = 0
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while i < len(sys.argv):
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if sys.argv[i] == '-f':
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i += 1
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f = float(sys.argv[i])
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elif sys.argv[i] == '-l':
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i += 1
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l = float(sys.argv[i])/1000
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elif sys.argv[i] == '-D':
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i += 1
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time.sleep(float(sys.argv[i])/1000)
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if f != 0 and l != 0:
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print(f, l)
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# https://stackoverflow.com/questions/974071/python-library-for-playing-fixed-frequency-sound
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num_samples = int(sample_rate * l)
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rest_frames = num_samples % sample_rate
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s = lambda i: 0.25 * math.sin(2 * math.pi * f * i / sample_rate)
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samples = (int(s(i) * 0x7F + 0x80) for i in range(num_samples))
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# write several samples at a time
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for buf in zip( *([samples] * sample_rate) ):
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stream.write(bytes(buf))
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# fill remainder of frameset with silence
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stream.write(b'\x80' * rest_frames)
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f = 0
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l = 0
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i += 1
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