maybe this link is useful for you http://trac.pjsip.org/repos/wiki/sound-problems I am also using pjsip at windows. But I use pjmedia directly to handle audio. Set ec_tail_ms to 0 will disable echo canceller, you can verify this by set log level to 5. Disable VAD and ec are ok at my side, codec is G711U too. I only get complain about audio quality when we enable resampling at conference bride. If I set conf and sound device to 44100 hz, callee at pstn side said he fell high frequence cut-off. At the same time caller at PC side is good. regards, Gang On Thu, Aug 28, 2008 at 5:14 AM, Patrick Greene <patrick.greene at evot.net>wrote: > Also ? we have disabled VAD and set EC tail to 0. That disables Echo > Cancellation correct? > > > > > > Thanks, > > Patrick Greene > > > > *From:* pjsip-bounces at lists.pjsip.org [mailto: > pjsip-bounces at lists.pjsip.org] *On Behalf Of *Patrick Greene > *Sent:* Wednesday, August 27, 2008 5:11 PM > *To:* pjsip at lists.pjsip.org > *Subject:* [pjsip] Questions about Audio Quality > > > > Hey Guys ? I really really hate using the lists unless I have absolutely > exhausted documentation and existing threads, but I'm in a situation where > we are getting audio quality issues and I can't seem to track it down. We > are using version .9 of the PJSIP library. We are using the pjsua_lib > library to create a soft phone for use within a Win32 .NET framework > application by compiling it in a managed C++ wrapper library. The > application is run on Win32/XP boxes. > > > > The problems we are having seem to be very bad quality audio primarily on > outgoing calls and in the inbound RTP direction (user of soft phone hears > poor audio quality, other side of RTP is ok). We have experienced this on a > couple of different PBX platforms including Trixbox and 3-com's SIP PBX both > exhibiting similar characteristics. We have tried different headsets and > just using the PC speakers all with similar results. The codec being used is > g711u, but this occurs on others as well. The audio sounds very scratchy, > choppy, jittery and almost metallic. We have set the audio quality in the > media config to 10 and no improvement. > > > > I guess the question I have is what information can we gather to help > troubleshoot this process. I notice a ton of buffer size changes in the > debug log, but that may be normal activity. Thanks for any help, pointers, > etc. that someone can provide. > > > > Sincerely, > > > > Patrick Greene > Software Engineer > Evo Technologies > > > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080828/f147eb08/attachment.html
