I'm experiencing the same problem (snd-hda-intel). The crackling isn't OGG exclusive; almost everything that SDL_mixer does is affected, and the problem is "fixed" by setting the volume to 100%.
-- Sound (OGG) crackles & snaps when SDL volume not set at 100% https://launchpad.net/bugs/66483 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
