I was recently having trouble with sound and RealPlayer10 on Linux. It turns out that RealPlayer10 (and Helix Player) only support the older OSS sound drivers (rather than the newer ALSA drivers). I was on 2.6.6. I downloaded 188.8.131.52 and this time only compiled the OSS drivers and not the ALSA ones. Be aware that you should not (perhaps cannot) load both OSS and ALSA drivers.
I finished the SISC videos last weekend (although I need to return to the last 4). I wanted to get back to finish watching a lecture webcast series for the subject Operating Systems and Systems Programming from Berkeley. I’ve seen a previous years lecture series but I’m pretty sure I didn’t finish. It’s all in Real media format so you need RealPlayer. It’s not so good on dialup – I hardly get a frame but the audio is ok.