Re: Audio Interfaces

[mike feeney <feeneymike@yahoo.com>]

Sure thing.

My mac is connected to the US-122 via USB cable.  The
US-122 only has RCA outputs, so I run an RCA cable out
to my M-Audio near-field monitors.  These are powered
monitors, each with their own power cable.  At the end
of the RCA cables, I have to use a 1/4" plug adapter
since the monitors have 1/4" inputs.  That's my
typical recording setup, and does not hum.

Broken down:

Mac > usb cable > tascam us-122 > stereo rca cable >
1/4" adapters > m-audio monitors.  (NO HUM.)

To test it out on a "live" setup, I unplugged the
monitors and instead ran the rca cable into the 2
inputs on my guitar amp, which resulted in a nasty
hum.

Mac > usb cable > tascam us-122 > stereo rca cable >
1/4" adapters > fender hot rod deluxe.  (HUM.)

I also tried running it into my PA:

Mac > usb cable > tascam us-122 > stereo rca cable >
1/4" adapters > Peavey 300W powered mixer > (out
through line-level monitor output) instrument cable >
powered Crate monitor.  (HUM.)

I even tried it without the Peavey power amp:

Mac > usb cable > tascam us-122 > stereo rca cable >
1/4" adapters > powered Crate monitor.  (HUM.)

Thanks.  All of the above resulted in a nasty hum. 
The only one that doesn't is with the near-field
monitors.

Mike



--- Rainer Straschill <rs@moinlabs.de> wrote:
> Mike,
> 
> could you detail your setup a little bit more,
> especially when it comes to a 
> comparison of "setup that does not hum" vs "setup
> that does hum"?
> 
>     Rainer
> 
> ----- Original Message ----- 
> From: "mike feeney" <feeneymike@yahoo.com>
> To: <Loopers-Delight@loopers-delight.com>
> Sent: Friday, April 08, 2005 4:34 PM
> Subject: Audio Interfaces
> 
> 
> > 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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> 


                
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