Python audio capture for Matrix

capture.py

'''
 * Copyright 2017 <andres.calderon@admobilize.com>
 * MATRIX Labs  [http://creator.matrix.one]
 * This file is part of MATRIX Creator HAL
 *
 * This example is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 '''

import alsaaudio, time, audioop

def capture():
    inp = alsaaudio.PCM(alsaaudio.PCM_CAPTURE,alsaaudio.PCM_NORMAL,"mic_channel0")

    inp.setchannels(1)
    inp.setrate(16000)
    inp.setformat(alsaaudio.PCM_FORMAT_S16_LE)
    inp.setperiodsize(512)

    loops=256

    rf = open('recording.raw', 'w')
    while loops > 0:
      loops -= 1
      l, data = inp.read()
      if l:
        print audioop.max(data,2)
        rf.write(data)

    rf.close()

capture()

In order to use it, you need the following dependencies:

sudo apt get install libasound2-dev  python-dev python-pip
sudo pip install pyalsaaudio