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  #1  
Old 12-04-2010, 12:57 PM
WRETAUDIO WRETAUDIO is offline
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Posts: 105
Default MBox2 Pro heavily distorted.

I have been working on a session for quite a while today. I left for lunch and left PT up and running. When I came back, the audio outputs of my MBox2 Pro are now heavily distorted. Both the line outs 1 and 2 and the headphone jacks on the front. Even iTunes is distorted without PT even running. I have trashed pref's and rebooted several times, but the sound is still distorted. What else can I try?

I am running PT 8.0.3 with OS 10.5.8.

Hardware Overview:

Model Name: Mac Pro
Model Identifier: MacPro3,1
Processor Name: Quad-Core Intel Xeon
Processor Speed: 2.8 GHz
Number Of Processors: 2
Total Number Of Cores: 8
L2 Cache (per processor): 12 MB
Memory: 6 GB
Bus Speed: 1.6 GHz
Boot ROM Version: MP31.006C.B05
SMC Version (system): 1.25f4
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  #2  
Old 12-04-2010, 02:15 PM
the.engineer the.engineer is offline
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Location: Guildford, Surrey, UK
Posts: 287
Default Re: MBox2 Pro heavily distorted.

Did a client spill coffee over it or something!? But seriously do you have anything to hook up to the S/PDIF outputs to test those?
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James Welch
Recording Engineer | Producer
Masterlink Productions

Mac Mini 8,1 (2018) | 3.2 GHz 6-Core Intel i7 | 64GB Ram | Apple 27" LED Cinema | 2TB System Drive | LaCie Rugged USB-C 2TB SSD NVMe Audio Drive | UAD-2 Quad Satellite (Firewire)

macOS Catalina 10.15.7 | Pro Tools Ultimate 2021.7 | Avid HDX TB3 Chassis | HDX | Avid Omni | Avid 16x16 HD I/O x2 | Digidesign 192 | Digidesign C24
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  #3  
Old 12-04-2010, 03:22 PM
WRETAUDIO WRETAUDIO is offline
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Default Re: MBox2 Pro heavily distorted.

It will take a while to set that up, but I still have heavily distorted audio analog outputs.
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  #4  
Old 12-04-2010, 03:24 PM
WRETAUDIO WRETAUDIO is offline
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Default Re: MBox2 Pro heavily distorted.

It's distorted on the SPDIF outs as well.
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  #5  
Old 12-04-2010, 03:58 PM
WRETAUDIO WRETAUDIO is offline
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Default Re: MBox2 Pro heavily distorted.

Just downloaded the latest Core audio drivers and now PT won't open at all. WTF!
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  #6  
Old 12-05-2010, 02:37 AM
WRETAUDIO WRETAUDIO is offline
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Default Re: MBox2 Pro heavily distorted.

Here a log of the crash.


Process: Pro Tools LE [183]
Path: /Applications/Digidesign/Pro Tools/Pro Tools LE.app/Contents/MacOS/Pro Tools LE
Identifier: com.digidesign.ProToolsLE
Version: ??? (???)
Code Type: X86 (Native)
Parent Process: launchd [91]

Interval Since Last Report: 996368 sec
Crashes Since Last Report: 27
Per-App Interval Since Last Report: 0 sec
Per-App Crashes Since Last Report: 23

Date/Time: 2010-12-05 05:35:37.005 -0500
OS Version: Mac OS X 10.5.8 (9L31a)
Report Version: 6
Anonymous UUID: 4ECB30AE-BA98-419E-9A21-6A1AEF87DA3F

Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Crashed Thread: 0

Dyld Error Message:
Library not loaded: @executable_path/../Frameworks/CFnd.framework/Versions/A/CFnd
Referenced from: /Applications/Digidesign/Pro Tools/Pro Tools LE.app/Contents/MacOS/Pro Tools LE
Reason: Incompatible library version: Pro Tools LE requires version 8.0.4 or later, but CFnd provides version 8.0.3
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  #7  
Old 12-05-2010, 04:23 AM
WRETAUDIO WRETAUDIO is offline
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Default Re: MBox2 Pro heavily distorted.

Uninstalled PT8 and reinstalled. It worked great for about ten minutes, then the heavy distortion came back. Please help me!
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  #8  
Old 12-05-2010, 05:16 AM
WRETAUDIO WRETAUDIO is offline
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Default Re: MBox2 Pro heavily distorted.

If I turn off my Mac Pro, the Mbox2 Pro is still powered up from the firewire bus power. In this state the audio passing from Analog in 1 and 2 and coming out analog 1 and 2 are fine. As soon as I boot up, then the distortion starts. Weird!
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  #9  
Old 12-05-2010, 05:59 AM
WRETAUDIO WRETAUDIO is offline
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Default Re: MBox2 Pro heavily distorted.

If I record into the MBox2 Pro into Garage Band and use the regular audio output of this Mac tower, everything sounds fine. As soon as I use the MBox2 Pro audio outputs for Garage Band, the output is heavily distorted. Audio out from the MBox2 Pro is distorted no matter what program I am using. (PT, Garage Band, iTunes etc.)
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  #10  
Old 12-05-2010, 06:45 AM
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SpinningDisk SpinningDisk is offline
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Default Re: MBox2 Pro heavily distorted.

This may be a stupid question but did you or your cat (if you have one ) accidentally brush up against the gain knob on the Mbox? If you unplug everything and just plug in your headphones to listen to incoming audio, do you still hear distortion? Good luck.
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