static PaError mixer_init()
{
  int source, soft_audio_mute, mute, volume, fd = 0;
  PaError result = paNoError;

  PA_DEBUG(( "mixer_init executed.\n" ));
  ENSURE_((fd = open(DEVICE_MIXER_BASE, O_WRONLY)), paInternalError);

  source = SOUND_MASK_PCM;
  ENSURE_(ioctl(fd, EMPEG_MIXER_WRITE_SOURCE, &source), paInternalError);

  soft_audio_mute = 0;
  ENSURE_(ioctl(fd, EMPEG_MIXER_SET_SAM, &soft_audio_mute), paInternalError);

  mute = 0;
  ENSURE_(ioctl(fd, EMPEG_MIXER_WRITE_FLAGS, &mute), paInternalError);

  volume = 100 | (100 << 8);
  ENSURE_(ioctl(fd, MIXER_WRITE( SOUND_MIXER_VOLUME ), &volume), paInternalError);

error:
  if (fd) close(fd);
  return result;
  
}