Hi Raymond. I was able to reproduce the issue on a different computer with the same soundcard. The biggest problem apparently lies in the way PulseAudio controls the volume sliders. As it automatically sets the PCM and Front sliders to 100% for PA volume levels >30%, that consequently leads to conflict with Bass and Trebble levels >0dB. That's absolutely perverse. The PCM (or Front) slider maximum needs to be defined as 100% - fx(Bass, Treble), where the fx function might be the maximum of the Bass/Treble values or their sum ... it probably depends on the soundcard. As I studied signal processing several years ago, I believe, the sum is safer. The ctl elem locking seems to be a different problem. Sometimes the PCM and Front sliders are not changed when I change the PA volume and in that case the distortion doesn't appear when I manually set either the PCM or the Front slider to lower value. The PA volume setting then doesn't affect the sliders and everything works. As the second issue caused a lot of confusion, it's possible some of my previous messages could be misleading.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1176528 Title: Sound distorted with pulseaudio when the player volume gets over 97% (tested with audacious, vlc and mplayer) Status in “pulseaudio” package in Ubuntu: New Bug description: Hello. I get a sound distortion when playing via pulseaudio and having the player volume set to 98% or higher. The problem doesn't occur when playing via ALSA. The sound system has great reserves. My soundcard: 05:02.0 Multimedia audio controller [0401]: Creative Labs SB Audigy [1102:0004] (rev 03) I'm willing to provide you with any debug information you need. Thanks, Jaromir. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1176528/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
