CD Sound broken

[Albert A. Modderkolk]

I am using Linux version 2.6.13-1.1532_FC4
([e-mail]) (gcc version 4.0.1 20050727 (Red
Hat 4.0.1-5)) #1 Thu Oct 20 01:28:35 EDT 2005
The CD player is a Pioneer CD/DVD R/W.

I deon't use it often for sound, so I can't say since when sound is
broken but it worked fine before.  Also now it reads data disks without
problems. DVD movies work fine.
I have issued the hdparm -d1 /dev/cdrom and /dev/dvd command.  Both
point to hdc. hdparm confirms that DMA is set to 1 but still there are
short interuptions in the music.

Any idea how I can fix this problem?

Tia, Albert