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Re: Recording to a laptop - and a pres question

Subject: Re: Recording to a laptop - and a pres question
From: "Ken Durling" <>
Date: Mon, 28 Nov 2005 20:50:47 -0000
--- In  Dan Dugan <> wrote:
>
> Ken Durling, you wrote,
> 
> >This year I'm trying a new approach, still with a laptop, involving
> >Shure WL-183 (lavalier omnis) which unaltered connect through a belt
> >pack pre with a 9V battery.
> 
> I'm assuming you have the Shure MX1BP preamps. I have a pair of 
> those. On my first test I thought they added some noise, on a second 
> examination they didn't. I was wrong once, but which time?


Yep, them's the ones.  I''m voting for the second time.  :-) 


> 
> >An XLR cable runs from the belt pack to
> >my US-122, which is the USB to the laptop.  My question is this: both
> >the belt pack and the US-122 contain preamps - I haven't noticed any
> >problems but is there anything to watch out for having two pres in the
> >line?  Do they just add up?
> 
> The gains do add. I expect the noise of the first preamp (MX1BP) will 
> be the critical one, and as long as it's quieter than the mic's own 
> noise (which I think it is...I think) that's ok.
> 
> >If so, I imagine gain and noise might
> >both increase together?  Would I be better of to remove the batteries
> >and just use the US-122s phantom power?
> 
> Doesn't make any difference whether the battery is in there or not 
> when phantom power is supplied, that is what it uses.


Right, for phantom power,  but I was thinking that removing the 9V
from the MX1BP would also remove that preamp from the circuit, forcing
it to use only the pres in the US-122.  Could that not concievably
result in a reduction of noise?  

Ken

P.S. - I'm planning to come by Saturday night, if it's still on. 
What, if anything, of all this would be helpful for me to bring?  I
could bring anything from the whole rig, to just some sample
recordings to nothing but a notepad.  






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