Horrible hiss and crackle on Mac Pro when playing music

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Offline
Joined: Aug 24 2005
Posts: 126

I get this really bad crackle and hiss whenever I play any music, but it only happens when the music is quiet. If I'm playing something loud and fast, it doesn't do it. The operating system itself (10.4.9) does it too when it is totally quiet. I can make it go away or reduce it by adjusting the volume with the keyboard, but it comes back after a bit. Seems like a driver issue maybe? I'm really not happy about this since I spent so much money on this computer and it has flaws like this... It doesn't even do it in WinXP, but it does in OS X. (Windows actually runs better on this machine than OS X does... Sad) I have a recording of it...

http://www.megaupload.com/?d=80V4JT9A (sorry to those that don't like megaupload)

And what it is supposed to sound like: http://youtube.com/watch?v=Q-xIAecXi3Q

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Mac Pro 2Ghz 2GB RAM X1900XT 320GB HD 160GB HD 40GB HD 10.4.7 Sceptre 20.1inch widescreen LCD | Pismo 400Mhz 256MB 10GB HD 10.4.1 | Power Mac G3 400Mhz 640MB RAM 18GB SCSI array Rage 128 10.4.7 | Athlon 64 3000+ 1GB RAM Geforce 6800GT 120GB HD 80GB HD XP

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Offline
Joined: Oct 7 2005
Posts: 87
something that I have always

something that I have always heard concerning this is if you have any large appliances on the same circuit as your computer (microwave, some TVs, fridge) the voltage fluctuations alone can cause audio distortions.

Another thing that will cause this is dirty power--IE power that inherently has voltage fluctuations, etc.

I would recommend getting one of those $40 UPSs (also serves as a real nice power conditioner as well). Worth a try.

Offline
Joined: Aug 24 2005
Posts: 126
Hmm that is possible, I have

Hmm that is possible, I have a ton of stuff on the same circuit. I know someone with a UPS I could borrow, maybe I'll try that.

__________________

Mac Pro 2Ghz 2GB RAM X1900XT 320GB HD 160GB HD 40GB HD 10.4.7 Sceptre 20.1inch widescreen LCD | Pismo 400Mhz 256MB 10GB HD 10.4.1 | Power Mac G3 400Mhz 640MB RAM 18GB SCSI array Rage 128 10.4.7 | Athlon 64 3000+ 1GB RAM Geforce 6800GT 120GB HD 80GB HD XP