Noisy Audio In G5, noisy audio in G5 Options

[crazyoval]

Hi guys.

I've just got myself a 2nd hand dual 2.7Mhz G5 running 10.4 and 4Mb RAM. Ive upgraded from a G4.

I have an issue with the G5 in that there is a lot of background noise, when I turn the volume up its like a bleeping sound mixed with buzz and crackle as I move the mouse around the screen. I had this on a G4 Powerbook and I could only stop it when I disconnected the power, clearly an option I don't have on the G5.

Has anyone else experienced this and has got to a solution? Ive done a search for 'noise' but couldn't find anything else.

Thanks in advance....

[fictionmusic]

I have been using CHUD tools and the nap thing for 5 years now with no adverse effects. I think that if you have the chirping (not all do by any means) then not disabling nap means that you'll get the noise into your audio output. I have used the Firewire 410, the RME Fireface 800 and 400 and they all let the chirping through so I had no choice but to disable nap.

I also have had my mac on for about 5 years now so I really don't think any hardware issue as far as longevity is really relevant. I have never had a single system crash (after the three I had switching sampling rates on the firewire 410 5 years ago; that was solved by updating the drivers....since then every thing has been rock solid) and I run a studio 24 hours a day.

This was a fairly known problem when the G5 came out, and everyone I have talked to about it reports flawless long-term use, so I really wouldn't worry about any hardware damage as a result of disabling nap.