On Wed, 2006-07-05 at 23:14 +0100, James Courtier-Dutton wrote: > Santiago Garcia Mantinan wrote: > > Hi! > > > > After upgrading to 2.6.17 skype on my Creative SB AWE64 PnP started to sound > > with really metallic voices, the speed and the tone seems similar to real > > but the voice is really metallic. I have tracked that down a bit, but don't > > really know what the problem is. > > > > I'm only able to find this problem with skype not with kiax or other similar > > software, the problem happens with the stable skype or with the latest beta > > they have in oss mode (they are adding alsa but that looks also broken for > > my card). > > > > I've tracked that down to the changes from alsa version 1.0.11-rc2 to rc3, > > in fact I compiled those two versions for 2.4.33-rc2 and got the very same > > problems with 1.0.11-rc3 and later versions while 1.0.11-rc2 worked ok. > > Also, PCI cards seem to work ok with skype and modern versions of alsa, so > > I guess this bug could be related to awe cards, maybe all sb16 based stuff. > > > > After looking at the changes in my configurations for rc2 and rc3 or later > > versions (I even tested version 1.0.12-rc1) I saw that rc2 didn't yet have > > the new oss-plugins, so I said, ok we'll remove the oss-plugins from -rc3 or > > later with --without-pcm-oss-plugins on configure and that'll do it. > > > > Wrong, after removing the oss plugins the voice I get when calling the skype > > test is ok but I get silences in the middle of it which makes it last longer > > than it should and continue after the "ding", also when I hear back what has > > been recorded the tone of my voice is really much higher than it should, > > even though the speed of it seems similar than it should. > > > > Well, like I said... I have only managed to find this kind of problems with > > skype (I'd sugest you use the stable version if you want to test it) and > > they are implementing alsa support, so if the bug only happens with skype > > maybe it's not worth the effort, but it looks to me that this is a problem > > that other programs may also have, and that is why I'm reporting it. > > > > Machines used for my tests were Pentium III and AMD K6-3, using Debian sid > > and testing (they have alsa libs 1.0.11). > > > > Well, if you need more info or tests just ask for what you need. Thanks for > > making ALSA so good. > > > > Regards... > > It seems that your thread has been hijacked, so I thought I would fix > this, but telling you how to fix your problem. > Your problem is caused by feedback. > The "alsamixer" has many gain controls. Without seeing the output of > amixer, it is hard to tell exactly which mixer control is set wrongly. > Essentially, make sure that the mic gain is set to a minimum or mute on > the playback view of alsamixer, and make sure pcm gain is set to minimum > or mute on the capture view of alsamixer. > > This will ensure that feedback does not occur inside the hardware mixer > of the sound card.
James, Do you think it's significant that the behavior changed from 1.0.11-rc2 to rc3? Lee Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
