[asterisk-users] chan_capi audio quality issue

[Léopold Baillard]

Le 16/12/2012 20:02, Valer Nur a écrit :
> From my experience, clicking noise can be originated from loss of audio frames.
> 
> First, verify your CPU is not loaded,

It is not.

> then measure the frame loss to see if this is the source of the problem.
>

How can I do that?

> 
> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> *From:* Léopold Baillard <leobaillard at leoserveur.org>
> *To:* asterisk-users at lists.digium.com
> *Sent:* Wednesday, December 12, 2012 7:33 PM
> *Subject:* [asterisk-users] chan_capi audio quality issue
> 
> Hi everyone!
> 
> I'm installing in our small office a phone system using a Fritz!Card USB
> that I found in my attic. I'm using Asterisk 1.8.13, FreePBX 2.11,
> chan_capi 1.1.6.
> 
> Everything works great, I can place outgoing calls, ingoing calls work,
> internal calls too, voicemail, ...
> 
> The only problem is the audio quality when using chan_capi to place
> calls. The remote party can not hear me clearly and from the asterisk
> side, I hear a clicking noise (I can try to record it if that helps)
> repeating at close intervals but only when someone is speaking or when
> there's music (basically, when there is no silence).
> 
> I've skimmed Google for answers and came up with some old posts dating
> back to 2003/4/6/... speaking about the CAPI_MAX_B3_BLOCK_SIZE value in
> chan_capi.h. I tried to tweak that value and recompile several times.
> Each time, I have the same clicking noise but the interval changes. I
> can't get rid of the noise though.
> 
> This is currently preventing me from putting my setup in production and
> I'd really like to find a solution for this.
> 
> I'll be glad to hear any pointers you can throw at me. I can basically
> try everything as this is not in prod yet.
> 
> Thanks a lot in advance!
> 
> -- 
> Léopold Baillard
> - Administrateur de Léoserveur -
> http://www.leoserveur.org/
> 
> Courriel : leobaillard at leoserveur.org <mailto:leobaillard at leoserveur.org>
> Téléphone [FR] : + 33 (0) 6 20 32 16 32
> Téléphone [DE] : + 49 (0) 151 21 40 55 46
> GPG : 59C6 1CCA 2343 8DE4 D4FF D96A BC55 4A21 3B90 C658
> 
> 
> --
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> 
> --
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> New to Asterisk? Join us for a live introductory webinar every Thurs:
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-- 
Léopold Baillard
- Administrateur de Léoserveur -
http://www.leoserveur.org/

Courriel : leobaillard at leoserveur.org
Téléphone [FR] : +33 (0) 6 20 32 16 32
Téléphone [DE] : +49 (0) 151 21 40 55 46
GPG : 59C6 1CCA 2343 8DE4 D4FF D96A BC55 4A21 3B90 C658

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