ref: 981e0a384c356e960b3a0959617e3a65f33801d0
dir: /python/demos/demo_create_test_sounds.py/
#! /usr/bin/env python
# -*- coding: utf-8 -*-
import sys, os
import numpy as np
from aubio import fvec, sink, float_type
if __name__ == '__main__':
if len(sys.argv) < 1:
print('usage: %s' % sys.argv[0])
sys.exit(1)
samplerate = 44100
hop_size = 256
# create python/tests/sounds if needed
output_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
output_dir = os.path.join(output_dir, 'tests', 'sounds')
if not os.path.isdir(output_dir):
os.makedirs(output_dir)
filenames = ['44100Hz_1f_silence.wav',
'22050Hz_5s_brownnoise.wav',
'32000Hz_127f_sine440.wav',
]
samplerates = [44100, 22050, 32000]
durations = [1, 5*22050, 127]
for fname, samplerate, duration in zip(filenames, samplerates, durations):
output_name = os.path.join(output_dir, fname)
g = sink(output_name, samplerate)
total_frames = 0
while total_frames < duration:
write = min(hop_size, duration - total_frames)
if 'brownnoise' in fname:
vec = np.random.rand(write).astype(float_type) * 2. - 1.
elif 'sine' in fname:
freq = 440
t = np.arange(write).astype(float_type) + total_frames
vec = np.sin(2. * np.pi * freq * t / float(samplerate))
else:
# silence
vec = fvec(write)
g(vec, write)
total_frames += write
outstr = "wrote {:2f}s".format(total_frames / float(samplerate))
outstr += " ({:d} frames".format(total_frames)
outstr += " at {:d}Hz)".format(g.samplerate)
outstr += " to {:s}".format(g.uri)
print(outstr)