Description of problem: Although sound works perfectly otherwise, the output is distorted, like it went through a distortion or overdrive filter. Connected external speakers, tested on two HP laptops with Intel audio. EL5 (2.6.18) does not have the problem. Version-Release number of selected component (if applicable): kernel-2.6.23.9-85.fc8 How reproducible: Distortion is audible in Soundcard Detection, or in any audio application. Steps to Reproduce: 1.Select Soundcard Detection from menu 2. Click Test button. 3. Install flash plugin and goto magnatune.com or youtube.com to hear distortion on a wide variety of sounds, or play a CD. Actual results: Distortion, especially on low frequencies. This is some kind of clipping, not just "tinny" tone. Expected results: Clear audio. ("Tinny" is to be expected on laptop speakers, but not distortion.) Additional info: 00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
Lots of people have this problem. Apparently works in F7 and Ubuntu as well as EL5. http://forums.fedoraforum.org/showthread.php?p=929936
Try turning down the volume inside the application program. Some of them apparently feed overmodulated sound to ALSA...
It is mostly fixed by compiling and installing the latest alsa source per the instructions in the forum thread. The few remaining cases (full chorus in classical) could indeed be the applications. To recap: su -c "yum groupinstall 'Development Tools'" su -c "yum install mercurial" hg clone http://hg-mirror.alsa-project.org/alsa-driver alsa-driver hg clone http://hg-mirror.alsa-project.org/alsa-kernel alsa-driver/alsa-kernel cd alsa-driver make ALSAKERNELDIR=alsa-kernel all-deps aclocal; autoconf ./configure --with-cards=hda-intel make || make su -c "make install"
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