Hi all, I assume there's a ALSA bug on SuSE 9.1 (64-Bit only). When using a device other than "plug:front:0" (e.g. "plug:surround40:0", "plug:surround51:0",...) for audio playback the sound is shuttering (only when playing real multichannel audio). I hope you can help me or at least verify this problem! The Details: My System: SuSE Linux 9.1 64 Bit AMD Athlon64 3200+ 1 GB DDR-RAM Creative Soundblaster Audigy 2 ZS Logitech Z5300 5.1 Speakersystem (analog) Since the only multichannel audio I have is on encrypted DVDs, I had to install the xine packages from Packman (http://packman.links2linux.de/?action=124). Because recompiling (rpmbuild --rebuild --target=x86_64 ...) the src.rpm for x86_64 failed, I installed the i686 packages. Playing DVDs works fine. If I set the xine "speaker_arrangement" to "Surround 5.1" (with kaffeine) I hear real 5.1 sound but it's shuttering all the time. I decided to setup a parallel installation of SuSE 9.1 (32-Bit) on my machine, also installed the i686 packman xine packages there and set "speaker_arrangement" to "Surround 5.1". But on the 32-Bit System 5.1 sound plays well without the shuttering. Then I did a second parallel installation of SuSE 9.1 (64-Bit), setup everything there as on the other two installations and I could reproduce the shuttering on a 64-Bit System. So it's definitely a problem that only occurs on 64-Bit Versions. I assume it's a ALSA problem, because I used the same xine packages for 64-Bit and 32-Bit. Next I checked YAST to see which ALSA packages were installed on my system. On SuSE 9.1 64-Bit there are two alsa packages installed: alsa (1.0.3-36) and alsa-32bit (9.1-200404070910) When I try to remove the alsa-32bit package, YAST reports conflicts with other dependent packages. These are only 32-Bit packages, among them are the 32-Bit Packman xine packages. This led my to the assumption, that every 32-Bit package which needs ALSA, requires and uses the alsa-32bit package. So the "shuttering"-problem is probably caused by the alsa-32bit package. To validate my theory I need a 64-Bit application that can play 5.1 surround sound and uses the alsa (64-Bit) package. As I said, the only 5.1 sound media I have is on encrypted DVDs, and the 64-Bit xine shipped with SuSE 9.1 does not support libdvdcss. So I'm stuck right now. Any Ideas? Can anyone with a 5.1 soundchip and SuSE 9.1 64-Bit reproduce this problem? (You don't need a 5.1 speaker system to check this, the choppy sound comes out of all speakers) Thx for your help