Subject: Re: [linux-audio-user] hum from laptop soundcard
From: Paul Winkler (pw_lists_AT_slinkp.com)
Date: Tue Apr 22 2003 - 17:33:02 EEST
On Tue, Apr 22, 2003 at 11:19:21AM +0200, Frank Barknecht wrote:
> Then the epanorama docs say "Do not do this", because it's
> "potentially very dangerous":
> http://www.epanorama.net/documents/groundloop/problem_solving.html
nice link,thanks!
btw, for anyone considering the Radio Shack car audio isolation
transformer - based on the specs, I'd say don't bother.
Frequency Response:...............300 Hz to 4000 Hz +/- 3 dB
http://support.radioshack.com/support_auto/doc9/9542.htm
OTOH, the Ebtech Hum Eliminator looks like a contendor...
2 channels of quality audio isolation for about $60 US retail.
it is reputed (on rec.audio.pro) to saturate easily at low
frequencies, but good enough to be useful.
then whirlwind has a gadget tailor-made for the laptop audio crowd...
the pcDI - AFAICT it's their Direct2 dual-DI box with an added
stereo 1/8" input and a flashier color box.
supposedly these are quite nice. but pricier - $115 US or so.
--Paul Winkler http://www.slinkp.com Look! Up in the sky! It's KING TELEVISION! (random hero from isometric.spaceninja.com)
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