<div dir="ltr"><div><div><div><div><div><div>Hi all,<br><br></div>I'm suffering from poor sound quality on my setup, using GSM on the a-leg and PCMU on the b-leg. I'm thinking it's mostly bandwidth/network related, so I'm considering switching to G729 on both legs, as that is the only compressed codec that the b-leg supports (it's a sip gateway).<br>
<br></div>But a complicating factor is that the calls need to be recorded in mp3.<br><br></div>So I have some questions that I hope someone here can answer:<br><br></div><ul><li>Does transcoding (for example GSM<>PCMU) negatively affect the sound quality, even when the CPU seems to be ok with it?</li>
<li>If yes, does recording 2 legs using the same codec (say G729) to a different sound format (say mp3) have the same (negative) effect? </li><li>When you use G729 on both legs (using mod_com_g729), it is even possible to record to mp3?</li>
</ul></div><br></div><div>Thank you,<br><br>Kees<br></div><br></div>