-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Tim Panton wrote: > On 8 Jan 2008, at 08:17, Armin Schindler wrote: > >> On Tue, 8 Jan 2008, CSB wrote: >>> We are experiencing slightly distorted audio with playing of >>> recordings on >>> our Asterisk server when the call comes in over our Eicon Diva >>> Server BRI >>> card. An example is an incoming call to IVR and playing some of the >>> standard >>> Asterisk voice prompts. Note that there is no audio problem with >>> internal >>> access to the same recording. Neither is there a problem with calls >>> not >>> involving the playing of recordings. The problem occurs >>> consistently and is >>> not related to system load. According to Eicon support: >>> >>> Asterisk is sending it's data packets (160 bytes each, i.e. 20ms) >>> in too >>> large intervals. This causes the transmitter of the Diva Server >>> card to >>> underrun and thus to fill with idle samples in regular intervals. >>> It's >>> almost between any two packets where we have to insert samples. >> ... >>> I wonder if anyone could provide any advice on how to continue >>> troubleshooting this issue? >> I never heard of that problem before. Which versions of asterisk and >> chan_capi (I assume you use chan_capi) do you use? >> >> If possible, can you provide a trace with >> set verbose 9 >> capi debug >> to me directly (not on the list, it is very big). >> Also, a full ditrace would help too. >> >> Armin > > > I saw something similar with mISDN. > If your recordings aren't an exact multiple of 20ms then > asterisk sends a short frame for the last one. > > Here's a quick hack that fixed the problem for me, > record the files in GSM. This forces the length of the recording to be > an exact multiple of 20ms.
Hmmm, sounds the same as what I had, but it was the transcoding that fixed it. I actually wrote a patch to send packets through a smoother which fixed it, and use that on all sites with IAX phones. - -- Kind Regards, Matt Riddell Director _______________________________________________ http://www.venturevoip.com (Great new VoIP end to end solution) http://www.venturevoip.com/news.php (Daily Asterisk News - html) http://www.venturevoip.com/newrssfeed.php (Daily Asterisk News - rss) -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFHg+szDQNt8rg0Kp4RAv6PAKC9YNd23bbA0rPIa+fo8YDxYdrTxQCgoAbI Prz9VaCLAlFrQdRSvYHxeBg= =9rBW -----END PGP SIGNATURE----- _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
