---

EXPORT void speex_echo_playback(SpeexEchoState *st, const spx_int16_t *play)
{
   /*speex_warning_int("playback with fill level ", st->play_buf_pos/st->frame_size);*/
   if (!st->play_buf_started)
   {
      speex_warning("discarded first playback frame");
      return;
   }
   if (st->play_buf_pos<=PLAYBACK_DELAY*st->frame_size)
   {
      int i;
      for (i=0;i<st->frame_size;i++)
         st->play_buf[st->play_buf_pos+i] = play[i];
      st->play_buf_pos += st->frame_size;
      if (st->play_buf_pos <= (PLAYBACK_DELAY-1)*st->frame_size)
      {
         speex_warning("Auto-filling the buffer (your application is buggy and/or got xruns)");
         for (i=0;i<st->frame_size;i++)
            st->play_buf[st->play_buf_pos+i] = play[i];
         st->play_buf_pos += st->frame_size;
      }
   } else {
      speex_warning("Had to discard a playback frame (your application is buggy and/or got xruns)");
   }
}

что мне закомментировать, чтобы услышать эхо?