Podcasts stalled by crappy sound

I’m mostly satisfied with running Fedora Core 3, but I’m having some difficulty getting rid of the crackly, popping sound that you heard in my last podcast. I’ve tried disabling apm, acpi, added no-hlt to the boot, disabled dma on the hard drive, and still the crackling badness remains. If anyone has any information which might be of help, try dropping dropping me an email.

lspci lists the sound controller as:

00:06.0 Multimedia audio controller: ALi Corporation M5451 PCI AC-Link Controller Audio Device (rev 02)

/proc/asound/version contains:

Advanced Linux Sound Architecture Driver Version 1.0.6 (Sun Aug 15 07:17:53 2004 UTC).
Compiled on Nov 18 2004 for kernel 2.6.9-1.681_FC3.

I thank you for any help in advance, as do my listener(s).