mirror of
https://github.com/DJ2LS/FreeDATA
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40 lines
868 B
Python
40 lines
868 B
Python
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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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#
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# Throw away test program to help understand the care and feeding of PyAudio
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import pyaudio
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import numpy as np
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CHUNK = 1024
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FS48 = 48000
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FTEST = 800
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AMP = 16000
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# 1. play sine wave out of default sound device
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p = pyaudio.PyAudio()
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stream = p.open(format=pyaudio.paInt16,
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channels=1,
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rate=FS48,
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frames_per_buffer=CHUNK,
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output=True
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)
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f48 = open("out48.raw", mode='wb')
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t = 0;
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for f in range(50):
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sine_48k = (AMP*np.cos(2*np.pi*np.arange(t,t+CHUNK)*FTEST/FS48)).astype(np.int16)
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t += CHUNK
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sine_48k.tofile(f48)
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stream.write(sine_48k.tobytes())
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sil_48k = np.zeros(CHUNK, dtype=np.int16)
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for f in range(50):
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sil_48k.tofile(f48)
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stream.write(sil_48k)
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stream.stop_stream()
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stream.close()
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p.terminate()
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f48.close()
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