---

EXPORT void speex_echo_capture(SpeexEchoState *st, const spx_int16_t *rec, spx_int16_t *out)
{
   int i;
   /*speex_warning_int("capture with fill level ", st->play_buf_pos/st->frame_size);*/
   st->play_buf_started = 1;
   if (st->play_buf_pos>=st->frame_size)
   {
      speex_echo_cancellation(st, rec, st->play_buf, out);
      st->play_buf_pos -= st->frame_size;
      for (i=0;i<st->play_buf_pos;i++)
         st->play_buf[i] = st->play_buf[i+st->frame_size];
   } else {
      speex_warning("No playback frame available (your application is buggy and/or got xruns)");
      if (st->play_buf_pos!=0)
      {
         speex_warning("internal playback buffer corruption?");
         st->play_buf_pos = 0;
      }
      for (i=0;i<st->frame_size;i++)
         out[i] = rec[i];
   }
}

как здесь отключить echo, звук шепелявый, надо проверить