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  #1  
Old 05-30-2009, 01:01 AM
JoeQ JoeQ is offline
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Join Date: Jul 2002
Posts: 94
Default horrible digital static or "feedback" sound

PT 8
original Mbox
G4 laptop 10.5.7

the mbox previously worked fine with 7.3 Did an uninstall from that disk before putting in PT 8.

now there is a large nasty feedback on channel 2
swapped all cables, swapped mics, and even USB cable
Problem remains on channel 2 - it is internal to the Mbox or internal to PT.

trashed prefs etc
there are no plugs
there no sends
no SPDIF connected
channels match in every visible way except input channels

just two 'plain' tracks trying to record.

the track will be quiet but once a certain moderate volume is exceeded it starts to crackle - very "digitally" Sometimes the static will sustain as if feeding back then a thump on the mic will often get it to stop. Another thump and it starts feeding back again.

Triple checked all my I/O settings, internal clock etc. Even reinstalled PT. Trashed the prefs again. Repaired permissions on the system disk.

I tried borrowing an Mbox2 from my school but that seems to be tied to an Academic Version of the software and PT won't launch.

I am running out of guesses and things to try.
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  #2  
Old 05-30-2009, 01:41 AM
Alimos Alimos is offline
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Join Date: Jun 2008
Location: Athens, Greece
Posts: 97
Default Re: horrible digital static or "feedback" sound

Try another USB port and make sure you don't share it with anything else.

I had something similar on PC few years ago and it turned out that the USB port was not offering enough electrical power.

Hope you sort it out.

Antonis
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  #3  
Old 05-30-2009, 02:39 AM
rhythmtechnologies rhythmtechnologies is offline
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Join Date: Jan 2009
Posts: 302
Default Re: horrible digital static or "feedback" sound

ive had this since day 1 with my 002. on 2 differant computers. all i do is just hit the phantom powere on and then off again. every time i switch the unit on this happens. very odd but doesnt really have any consequences for me. still works perfect.
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Old 05-31-2009, 01:07 PM
JoeQ JoeQ is offline
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Join Date: Jul 2002
Posts: 94
Default Re: horrible digital static or "feedback" sound

I posted here by mistake
my setup is on a mac laptop

I did try the other USB jack but it was the same

cycling the phantom will trigger the static, but so will any level on the mic or plugging the cable in and out etc.

I tried the firmware thing, but I already have the 'latest' version
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  #5  
Old 06-01-2009, 08:34 AM
sw rec sw rec is offline
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Join Date: Oct 2005
Location: Colo Spgs Colo
Posts: 6,375
Default Re: horrible digital static or "feedback" sound

Have you tried a powered USB hub? And make sure your Mbox is the ONLY thing plugged into the hub. I have seen this happen when there isn't enough current on the USB port, and oddly enough, I've seen it more frequently with MACs than with PCs.
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