So, does the dsp_api.ndb-&gt;a_du_0 member hold the audio data to be send to the other peer, or that&#39;s something else?  How can I capture the audio data (after codec), make a slight modification to that data, and send it to the other mobile?  I can see that AUDIO_TX_TRAFFIC_REQ/AUDIO_RX_TRAFFIC_IND audio mode were created for that purpose, but I&#39;m not sure how to use that.  Do I need to make the modifications I need on gsm_recv_voice and gsm_send_voice (voice.c)?<br>
<br><div class="gmail_quote">On Fri, Dec 2, 2011 at 5:50 PM, Sylvain Munaut <span dir="ltr">&lt;<a href="mailto:246tnt@gmail.com">246tnt@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="im">&gt; Do any of you know where can I find documentation about the DSP API used in<br>
&gt; Osmocom?<br>
<br>
</div>Nowhere. There is no doc. (Not that we have access to anyway ... I&#39;m<br>
sure Texas Instruments has it ...)<br>
</blockquote></div><br>