Does anyone have a work around for the design on PowerMac G5 2005 flaw that causes noise interference on the outputs? (Audiophile, sound engineer)

OK, here's my problem - I have a set of audio interface Protools Digi 002 via Firewire 400 on a PowerMac G5 I was lucky enough to be given last year. I finally managed to connect my home recording studio system, he wire of mixer etc, but when I listen to the music coming from the outputs of the Digi 002 there in a great cacophony of audio interference, so much and so well, when I mount the system I can move my pointer between two monitors and it plays a different frequency of buzz. Everytime I open a window, Soft etc it is more electronic noise.

He took a while to limit, but after reading this excerpt from wikipedia, it seems that it was a fault common to this particular model until Apple released the revised version of the B of the G5 (?);

' The first versions of the dual processor G5 have problems of noise . The first is ground loop- based interference,[5] that sometimes causes noise seeps into the outputs audio analogue. This bug has been fixed in Rev. B G5.'

and

' Well that the noise problems do not prevent computers affected work, they asked problems for audio professionals and enthusiasts as well, especially for models to liquid cooling, which had been expressly designed as mechanically quiet for listeners. "

Well, that's no euphemism - in fact it makes the mac completely useless for my needs, I need the outputs clean digital noise to send for outboard effects/EQ/etc.

As it was a common fault, I was hoping someone might be able to shed some light on a workaround solution, as I can't imagine recording ground studios just stop until this has been fixed by releasing a new G5?

The only idea that I came up with so far is to buy a transformer of isolation, but I'm not entirely convinced that will solve the problem?

Any help on this would be greatly appreciated!

Thanks in advance

Have you tried CHUD Tools & turn off NAP mode?

The first versions of the dual processor G5 have problems of noise . The first is ground loop- based interference,[5] , which causes sometimes analog audio output sound leaks. This bug has been fixed in Rev. B G5.

The second problem of noise came from his "tweets", which can be triggered by power fluctuations. For example, display or hide the Dock makes a short beep. Many blamed the power supply used in the G5 as the cause, but this theory has never been confirmed. A very effective workaround is to disable microprocessors 'siesta' using Apple CHUD Tools, but this was not recommended by Apple. This noise problem has not set until the generation of dual-core G5s was produced, but it does not affect the model of "Late 2004" (at least there have never been reports). Draw of power fluctuation has been later attributed to the lack of power management features in processors simple heart. [6] Apple eventually posted information bug tweets on its support site. [7]

Although noise problems did not prevent the computers assigned to work, they were problematic for audio professionals and enthusiasts as well, especially for models with cooling liquid, which had been expressly designed as mechanically quiet for listeners.

https://en.Wikipedia.org/wiki/Power_Mac_G5

Just one last note on the use of CHUD tools to disable the 'Nap' on the G5 Dual functionality: restart your machine reactive 'Nap '. You may have already seen this on the Apple forums. Kind of a bummer - although I rarely shut down my machine. In any case, running with 'Nap' off today seems to have resulted in a significant increase in general speed/responsiveness for me (I'm still running the stock 512 MB RAM, with another 1 GB on the way).

«Matthew S.»

http://www.xlr8yourmac.com/G5/G5_noise_tips.html

Tags: Mac

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