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.

[crazyoval]

thanks fictionmusic, from the posts the other guys referred me to it did seem ambiguous. Since its something that you have to switch off each time you turn on the studio (assuming you turn off your studio which in you case seems not to be the case) I can turn it on when I need it.

Thanks for your advice. Wish I had done this with my powerbook nearly 5 years ago now.