Audio Interfaces

[mike feeney <feeneymike@yahoo.com>]

I've got a Tascam US-122 audio interface (USB, 2-in,
2-out + midi in/out).  Does the job I need for
recording at home for the most part, but I've been
thinking of using it live.  So I tested the whole
layout at home the other day (looping with my Mac,
SooperLooper, and the FCB1010) but I got an obnoxious
high-pitched hum no matter what setup I tried.  I
tried running the audio out of the US-122 into my PA
head (which resulted in the hum), and also straight
into my Fender Hot Rod Deluxe 410 amp, and both
situations resulted in the same high-pitched
background hum.  I tried different cables, different
inputs, etc.  

When I use the US-122 with my little near-field
monitors, I get no hum.  Am I doing something wrong,
or does this not work for reasons to which I'm
oblivious?  ;)

Thanks,
Mike


                
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