<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns:p="urn:schemas-microsoft-com:office:powerpoint" xmlns:a="urn:schemas-microsoft-com:office:access" xmlns:dt="uuid:C2F41010-65B3-11d1-A29F-00AA00C14882" xmlns:s="uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882" xmlns:rs="urn:schemas-microsoft-com:rowset" xmlns:z="#RowsetSchema" xmlns:b="urn:schemas-microsoft-com:office:publisher" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" xmlns:c="urn:schemas-microsoft-com:office:component:spreadsheet" xmlns:odc="urn:schemas-microsoft-com:office:odc" xmlns:oa="urn:schemas-microsoft-com:office:activation" xmlns:html="http://www.w3.org/TR/REC-html40" xmlns:q="http://schemas.xmlsoap.org/soap/envelope/" xmlns:rtc="http://microsoft.com/officenet/conferencing" xmlns:D="DAV:" xmlns:Repl="http://schemas.microsoft.com/repl/" xmlns:mt="http://schemas.microsoft.com/sharepoint/soap/meetings/" xmlns:x2="http://schemas.microsoft.com/office/excel/2003/xml" xmlns:ppda="http://www.passport.com/NameSpace.xsd" xmlns:ois="http://schemas.microsoft.com/sharepoint/soap/ois/" xmlns:dir="http://schemas.microsoft.com/sharepoint/soap/directory/" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:dsp="http://schemas.microsoft.com/sharepoint/dsp" xmlns:udc="http://schemas.microsoft.com/data/udc" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:sub="http://schemas.microsoft.com/sharepoint/soap/2002/1/alerts/" xmlns:ec="http://www.w3.org/2001/04/xmlenc#" xmlns:sp="http://schemas.microsoft.com/sharepoint/" xmlns:sps="http://schemas.microsoft.com/sharepoint/soap/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:udcs="http://schemas.microsoft.com/data/udc/soap" xmlns:udcxf="http://schemas.microsoft.com/data/udc/xmlfile" xmlns:udcp2p="http://schemas.microsoft.com/data/udc/parttopart" xmlns:wf="http://schemas.microsoft.com/sharepoint/soap/workflow/" xmlns:dsss="http://schemas.microsoft.com/office/2006/digsig-setup" xmlns:dssi="http://schemas.microsoft.com/office/2006/digsig" xmlns:mdssi="http://schemas.openxmlformats.org/package/2006/digital-signature" xmlns:mver="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns:mrels="http://schemas.openxmlformats.org/package/2006/relationships" xmlns:spwp="http://microsoft.com/sharepoint/webpartpages" xmlns:ex12t="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:ex12m="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:pptsl="http://schemas.microsoft.com/sharepoint/soap/SlideLibrary/" xmlns:spsl="http://microsoft.com/webservices/SharePointPortalServer/PublishedLinksService" xmlns:Z="urn:schemas-microsoft-com:" xmlns:st="" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-AU link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>As a thought, could you try using a different audio device.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>For example, I use “ALSA 1: Chat 150”, rather than the default device “ALSA Default: Chat 150”, as using the Default device causes me corrupt audio.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Does this have any effect in the issues you are seeing ???<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I have seen lots of issues using the default device and maybe the work you have done below might suggest a possible fix. I would be interested to hear more.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Regards,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Jason.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> sumover-tech-bounces@cs.ucl.ac.uk [mailto:sumover-tech-bounces@cs.ucl.ac.uk] <b>On Behalf Of </b>?????? ??????<br><b>Sent:</b> Friday, 12 November 2010 08:03 PM<br><b>To:</b> sumover-tech@cs.ucl.ac.uk<br><b>Subject:</b> [Sumover-tech] RAT corrupt sound<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hello all!<br><br>I have a problem with RAT on Fedora 11, 12. Received sound has a lot<br>of jamming what sounds like ugly electronic noise. I try to solve this<br>problem by myself since may of 2010, and I found some solution but<br>still not found problem source and cannot fix it but lower sound<br>corruption. I interesting only 48kHz Mono mode, btw. How can I fix it?<br>First, I checkout latest version of RAT from repository and build a<br>debug version of common lib and rat itself. And first thing what I<br>find is horrible spamming of message:<br><br>RTP packet queue overflow.<br><br>So I just enlarge a little this queue. Sound become slightly better.<br>Next my target was find why messages<br><br>Insert X samples.<br>Playout buffer shift back X samples.<br><br>occurs and sound has jamming and flipping. I find out what it cause<br>because there is some unsynchronization detecte in function<br><br>int source_check_buffering(source *src) in file source.c<br><br>I have no idea why it does. And I don't know how to debug it. Hardware<br>problem? Software? ALSA? No idea. Then I go to the ALSA settings and<br>starts an experiments to configure default ALSA device. And I find a<br>configuration what almost do a sound well!! So there it is:<br><br>1) I add .asoundrc file in my home directory:<br>defaults.ctl.!card Intel<br>defaults.pcm.!card Intel<br><br>defaults.pcm.dmix.!rate 48000<br>defaults.pcm.dmix.!format S16_LE<br><br>2) And, important, I manually setup buffers sizes for default ALSA<br>device directly in dsnoop.conf and dmix.conf. And channel count and<br>binding also. There it is:<br><br>I add to dsnoop.conf:<br><br>channels 2<br>period_time 10000<br>periods 16<br>bindings.0 0<br>(very short fragments)<br><br>And to dmix.conf:<br><br>channels 1<br>period_time 300000<br>periods 16<br>(laaaarge fragments)<br><br>And VOILA! sound become clean and very good ... almost. Once-twice in<br>5 min interval randomly occurs same flips and messages:<br><br>Insert X samples.<br>Playout buffer shift back X samples.<br><br>That is my story. If some one know this problem and know how to debug<br>and fix it, lets discuss! Also, I can send my hardware and software<br>configuration if needed.<br><br>And at last, I wrote some CLI interface to RAT what useful when RAT<br>work in -noui mode and I can share it if some one interested about it<br>:) Its not perfect may be because I have no one friend who understand<br>the mbus and RAT :) But it works. <o:p></o:p></p></div></body></html>