This is due to a broken ALSA update patch for the cs46xx code.  Apply 
the included patch which unbreaks the update.

David

dean . wrote:

> Kernel versions 2.5.61-64 (Havnt tried 60) produce stuttering sound 
> when using alsa and mmap (xmms alsa output plugin) or oss emu and mmap 
> (quake3?) produce stuttering sound happening after around the first 
> half second of playing. This is with the kernels alsa cs46xx module 
> and a Turtle beach Santa Cruz soundcard. Works fine with 2.5.59 though.