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  #1  
Old 06-27-2006, 07:42 AM
Chuck1073 Chuck1073 is offline
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Default Mbox 2 - High pitched tone in bkgrd

Just installed Mbox 2 and PT 7.0 this weekend to replace my AM-III/6.1.1 set-up.

By far the most painless PT install I've ever done!

Here's the one problem though. When PT is loaded I get a high pitched (about 4-6k) tone...almost sounds like it could be a "carrier" of sorts for the USB. Very low level...but bothersome all the same.

I'm using a garden-variety 10' USB cable until the Monster cable I ordered arrives...hoping that clears it up.

Has anyone else encountered this?
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  #2  
Old 06-27-2006, 07:52 AM
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DigiTechSupt DigiTechSupt is offline
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Default Re: Mbox 2 - High pitched tone in bkgrd

You say you're using a 'garden variety' USB cable - are you not using the USB cable that came with the Mbox?

Also, are you on a laptop or desktop? If you're on a laptop, does the sound change or go away when switching between batteries and the power adaptor?
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Old 06-27-2006, 08:38 AM
Chuck1073 Chuck1073 is offline
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Default Re: Mbox 2 - High pitched tone in bkgrd

I'm using a longer (12') cable since my tower is in a separate room for noise reasons.

The PC is a desktop.
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Old 06-27-2006, 04:15 PM
Chuck1073 Chuck1073 is offline
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Default Re: Mbox 2 - High pitched tone in bkgrd

Bump. Anyone? Bueller?
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  #5  
Old 06-27-2006, 04:37 PM
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Default Re: Mbox 2 - High pitched tone in bkgrd

Try the USB cable that came with the Mbox - does the noise go away? You should really use that one, as it has inline filtering that would very likely help.
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Old 06-27-2006, 05:46 PM
Chuck1073 Chuck1073 is offline
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Default Re: Mbox 2 - High pitched tone in bkgrd

Will do.

BTW - noticed, while working this aft, the 'tone' (sounds like a digital "whine" bad shield?) is also showing up on the output of the PC's native soundcard. Eveything stops when I quit Pro-Tools.

PC is an Athlon 64/Nvidia NForce 3/GForce if that helps. New install so all drivers are current.

Looking for a way to extend the supplied cable...a hub? Thought I read that passive hubs aren't supported.

Feeding Mbox 2 with an outboard mixer (alt 3/4 bus to Mbox input/Mbox output to fader and main mix for monitoring - not a feedback loop) Used the same setup with AM-III for years with fantastic results, trying to achieve the same with the Mbox 2. Need to keep the breakout box at the operators position rather than in the machine room for access to the mix fader on the breakout box.
Using this setup for voice-over and broadcast production.
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Old 06-27-2006, 08:09 PM
Art B Incredible Art B Incredible is offline
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Default Re: Mbox 2 - High pitched tone in bkgrd

I have the exact same problem and I'm using the USB cable that came with the MBox 2. I'm a Mac Mini 1.25 GHz OS 10.4. Everytime I turn on ProTools the noise comes up and when I turn it off it goes away.
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  #8  
Old 06-28-2006, 06:12 AM
Chuck1073 Chuck1073 is offline
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Default Re: Mbox 2 - High pitched tone in bkgrd

That's interesting. Was thinking it might be a windows device conflict sort of situation...but if it's happening on a Mac..hmmm...and with the supplied cable with the ferrite....

What say you Digi?
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  #9  
Old 07-07-2006, 11:30 PM
Glatt79 Glatt79 is offline
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Default Re: Mbox 2 - High pitched tone in bkgrd

I have the same noise and whenever I bounce to disk , this noise shows up in my recordings. Tried moving the mbox2 away from my recording setup but this noise still persists. We need an actual solution. Im running out of time with this , think I might just switch over to a m-audio device and pro tools m powered. I better be able to return this thing.
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  #10  
Old 07-08-2006, 06:04 PM
astern astern is offline
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Default Re: Mbox 2 - High pitched tone in bkgrd

Hello,

I too was having the high-pitched whine - only out of my monitors, not the headphone output on the mbox 2. after reading through this thread I decided to pick up a pair of TRS-XLR cables for my monitors, even though the guys at the music store said this would have no effect as the mbox didn't have balanced outputs.

This totally FIXED the problem. Completely. No more whine. If anyone experiencing this hasn't picked up a pair of balanced cables it's completely worth it.

Hope this helps,

Adam
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