Mac Pro 09 Audio Update 1.0 causing problem with pro audio hardware devices !

My System:

Mac Pro 8 Core 2.26 GHz
12GB ECC Ram
GTX 285 , GT 120
3x1TB Caviar Black (OS 10.6.2*), 1x640GB (Windows 7)
*Software is up to date !

Audio Hardware:

Apogee Ensemble (Interface and Soundcard)

http://www.apogeedigital.com/products/ensemble.php

Apogee is a company which is working closely with Apple together on their Audio products

Problem:

Since I installed the Audio Update 1.0 for Mac Pro's early 2009 by Apple Software Update to solve the Audio Heat / Performance problem I have realized a high pitched noise / whistle sound.

When I turn on my Ensemble, I am getting a high pitched noise / whistle sound coming out from my Mac Pro. I think the source of the sound is somewhere around the Firewire inputs in the back of the Mac. I tried to locate it , but it is very hard. As soon I turn my Ensemble off, the high pitched noise is away !

- The noise / whistle is very good recognizable
- I have no problem with other external devices such as hard discs
- I could not locate the noise to an internal fan
- It does not matter if I playback music or not
- The high pitched noise is pretty constantly, but sometimes a bit quieter. And sometimes gone for just a second. But mostly constantly.
- It does not matter on which input of the Mac Pro I attach the firewire cable to connect the Ensemble
- I tried messing around with the Ensemble Software Settings (changing frequencies etc.) with no success.
- I reinstalled Apogee Ensemble Software Updates
- I reinstalled Apogee Ensemble Firmware Updates
- (edit) The noise still exists even when I plug the power adapter into another power source

When I wear my headphones and plug them into my Mac Pro it is dead silent. But if I turn on my Ensemble, I have the same frequency of a high pitched noise / whistle on my headphone output as my system does ! It does not matter if I choose the Ensemble for I/O or not.

I have a clean OS X 10.6.2 installation on an external HD. I booted today from this HD. I connected my Ensemble with my Mac and turned it on. I did not hear any high pitched whistle or noise.

I left my system with the ensemble running for about an hour and I did not hear any noises or whistles on the external HDD with OSX 10.6.2 without audio fix. So I downloaded the Audio Update 1.0 for the Mac Pro, which Apple has released last Thursday. After the successfully installation and restart, the high pitched noise was there again.

Does anybody experienced this with his external audio interface / does anybody else own a Apogee Ensemble with a 09 Mac Pro ?

edit:

Here is the "UNDO" for reverting the audio patch 1.0 :

http://rapidshare.com/files/354706662/UNDO_Audio_Fix_1.0_Update_by_Apple.zip

Containing:

- Two .kext files (AppleHDA/IOPlatformPluginFamily) for 10.6.2
- Two .kext files (AppleHDA/IOPlatformPluginFamily) for 10.6.2 with Audio Update 1.0
- Kext Helper b7
- Tutorial

So you can change the files anytime you want.

Thread on the Apple Discussions Forum about the same problem - Other Interfaces seem to make the same effect :

http://discussions.apple.com/thread.jspa?threadID=2339757&tstart=0

Noise (video 720p):

http://www.youtube.com/watch?v=oXOgHpcqqNo

Noise (audio):

 

Thank you Jesse.

The noise still exists, even when I move the power adapter into another power source.

 

Thank you, I will try this on my external OS X installation. I already think it's the audio fix because the problem startet after the audio update fix on both osx installations.i will give it a try anyway.

 

I was just thinking about it today again (i'm not at home). I can try it tomorrow but I don't think I will see anything different because I already tested it with a clean OSX 10.6.2 installation and then with the audio fix. It was maybe not that obvious written in my post. I edited it:

 

The noise still exists. Even with no CPU/GPU/HDD/MOUSE activity.

I copied the two files on a clean 10.6.2 installation. I wanted to reboot and I only saw loading cycle and nothing happened (waited 10min). It does not work.... Any other suggestions ?

But still :

10.6.2 clean installation - no noises
10.6.2 clean installation with audio fix - high pitched whistle sounds / noises

I attached an audio file with the signal from the front output headphone jack. The high pitched signal is pretty the same coming out from the Mac Pro itself.

To who or what department should I report this bug best ?

 

thank you Cindori, I tried kext helper and it worked.

I installed the two kext files successfully on my external test HDD with 10.6.2 installed . After rebooting, I got the noise. So the audio fix is 100% the culprit...

Where exactly should I report this to ?

 

Thanks for your link cranesong.

It's unbelievable that it took apple one or two weeks to invest and fix the problem and they didn't even tested it probably AGAIN ! And when it's out, it generates another PROBLEM ...

 

thanks for posting and adding the issue on your page.
you can add my interface too. I already posted the noise from the headphone front output ! The noise from the Mac Pro itself is pretty the same. Exact same frequencies. But I can record a mp3 from the Mac Pro aswell. You can post it on your page, if you want. I am wondering if other people here with their APOGEE DUET experience anything similar ?

 

Here is the "UNDO" for reverting the audio patch 1.0 :

http://rapidshare.com/files/354706662/UNDO_Audio_Fix_1.0_Update_by_Apple.zip

Containing:

- Two .kext files (AppleHDA/IOPlatformPluginFamily) for 10.6.2
- Two .kext files (AppleHDA/IOPlatformPluginFamily) for 10.6.2 with Audio Update 1.0
- Kext Helper b7
- Tutorial

So you can change the files anytime you want.


It's difficult to get the noise on microphone, even with room condenser mic it was difficult. I recorded a video on youtube. Volume up your speakers to hear everything (maybe listen to this with headphones is better). The noise is much more recognizable in original !

Mac Pro noise (video+audio):

http://www.youtube.com/watch?v=oXOgHpcqqNo


The noise is much better hearable here. It's the high pitched one you have to focus on.
Mac Pro headphone jack signal noise (audio):

 

I'd say the sound comes from somewhere on the logic board. I think it's around the firewire I/O on the backside . I can't tell that specific. As far I know the internal speaker is on the front site (?).