<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt">From my experience, clicking noise can be originated from loss of audio frames.<br><br>First, verify your CPU is not loaded, then measure the frame loss to see if this is the source of the problem.<br><br><div><span><br></span></div><div><br></div> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <font face="Arial" size="2"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> Léopold Baillard <leobaillard@leoserveur.org><br> <b><span style="font-weight: bold;">To:</span></b> asterisk-users@lists.digium.com <br> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, December 12, 2012 7:33 PM<br> <b><span style="font-weight: bold;">Subject:</span></b>
[asterisk-users] chan_capi audio quality issue<br> </font> </div> <br>
Hi everyone!<br><br>I'm installing in our small office a phone system using a Fritz!Card USB<br>that I found in my attic. I'm using Asterisk 1.8.13, FreePBX 2.11,<br>chan_capi 1.1.6.<br><br>Everything works great, I can place outgoing calls, ingoing calls work,<br>internal calls too, voicemail, ...<br><br>The only problem is the audio quality when using chan_capi to place<br>calls. The remote party can not hear me clearly and from the asterisk<br>side, I hear a clicking noise (I can try to record it if that helps)<br>repeating at close intervals but only when someone is speaking or when<br>there's music (basically, when there is no silence).<br><br>I've skimmed Google for answers and came up with some old posts dating<br>back to 2003/4/6/... speaking about the CAPI_MAX_B3_BLOCK_SIZE value in<br>chan_capi.h. I tried to tweak that value and recompile several times.<br>Each time, I have the same clicking noise but the interval changes. I<br>can't get rid of
the noise though.<br><br>This is currently preventing me from putting my setup in production and<br>I'd really like to find a solution for this.<br><br>I'll be glad to hear any pointers you can throw at me. I can basically<br>try everything as this is not in prod yet.<br><br>Thanks a lot in advance!<br><br>-- <br>Léopold Baillard<br>- Administrateur de Léoserveur -<br>http://www.leoserveur.org/<br><br>Courriel : <a ymailto="mailto:leobaillard@leoserveur.org" href="mailto:leobaillard@leoserveur.org">leobaillard@leoserveur.org</a><br>Téléphone [FR] : + 33 (0) 6 20 32 16 32<br>Téléphone [DE] : + 49 (0) 151 21 40 55 46<br>GPG : 59C6 1CCA 2343 8DE4 D4FF D96A BC55 4A21 3B90 C658<br><br><br>--<br>_____________________________________________________________________<br>-- Bandwidth and Colocation Provided by <a href="http://www.api-digital.com/" target="_blank">http://www.api-digital.com</a> --<br>New to Asterisk? Join us for a live introductory webinar
every Thurs:<br> <a href="http://www.asterisk.org/hello" target="_blank">http://www.asterisk.org/hello</a><br><br>asterisk-users mailing list<br>To UNSUBSCRIBE or update options visit:<br> <a href="http://lists.digium.com/mailman/listinfo/asterisk-users" target="_blank">http://lists.digium.com/mailman/listinfo/asterisk-users</a><br><br> </div> </div> </div></body></html>