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Kyubyong/numpy_array_to_wav_file.py

Forked from akey7/numpy_array_to_wav_file.py
Created June 21, 2019 01:11
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Generate a .wav sound file from a NumPy array.
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numpy_array_to_wav_file.py
import numpy as np
from scipy.io.wavfile import write
# Samples per second
sps = 44100
# Frequency / pitch of the sine wave
freq_hz = 440.0
# Duration
duration_s = 5.0
# NumpPy magic
each_sample_number = np.arange(duration_s * sps)
waveform = np.sin(2 * np.pi * each_sample_number * freq_hz / sps)
waveform_quiet = waveform * 0.3
waveform_integers = np.int16(waveform_quiet * 32767)
# Write the .wav file
write('first_sine_wave.wav', sps, waveform_integers)
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Pay attention to line 17.

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