Package: oss4-base Version: 4.2-build2006-2+deb7u1 Severity: normal Crackling sound is present with flash, gnash and supertuxkart. Sound in clementine, vlc, gnome-mplayer is correct. When disabling vmix0-enable and setting vmix0-source to off the sound becomes clean/correct. Also it seems sound becomes better when setting vmix0-outvol not to max. Pulseaudio and Alsa are not installed. Also tried the following, removed libflashsupport for flash, rerouted the default alsa output from flash through libasound to oss4. Same crackling noise is present. Just tried build2007 from unstable with no improvement.
--- System information. --- Architecture: amd64 Kernel: Linux 3.2.0-4-amd64 Debian Release: 7.0 500 wheezy apsy.gse.uni-magdeburg.de 500 testing security.debian.org 500 testing ftp.nl.debian.org 500 data apsy.gse.uni-magdeburg.de --- Package information. --- Depends (Version) | Installed ======================-+-=========== libc6 (>= 2.7) | 2.13-37 Recommends (Version) | Installed =========================-+-=========== pm-utils | 1.4.1-9 Suggests (Version) | Installed ===========================-+-=========== oss4-modules |