I tried to solve this problem this week as well. It seems that it's not possible to play audio CDs in KDE (through arts) on NewWorld ppc machines.
KsCD doesn't actually read the CD data, but controls the track movement and relies on the CD/soundcard direct connection (which doesn't exist on NewWorld macs). So it's silence. (See KDE bug #44216, and vote on it!) It seems that the only GUI music player to support reading the data from the CD itself is xmms. (Install the xmms-cdread module and activate it in xmms.) However, while there is an xmmsarts package as well, it wasn't written with endian issues in mind. So trying to use it ends up with white noise. Actually, there is a workaround to the xmmsarts problem. Call xmms with the artsdsp program, like so: $ artsdsp xmms Then configure xmms to use the normal OSS output. Also, supposedly noatun supports cd playing as well. Type in "audiocd:/dev/cdrom" in the file selection dialog. It seems to want to rip all the tracks before playing though. But, there is no clean way to play audio CDs with arts. Frank