#! /usr/bin/env python# -*- coding: utf-8 -*- import sys, osimport numpy as npfrom 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)