Re: [linux-audio-user] High sample rate cards

From: carmen <>
Date: Sat Aug 26 2006 - 02:38:45 EEST

On Fri Aug 25, 2006 at 03:02:59PM -0700, st wrote:
> >Common misconception... Very high frequency audio does not equal
> >electromagnetic radiation (radio, etc.). Audio is the compression and
> >expansion of air, so it isn't really affected by EMI.
> Ok, but the microphone converts the air vibrations into electric
> vibrations. People have picked up radio in their braces and fillings.
> It doesn't seem entirely unreasonable to guess that an electromagnetic
> radiation signal vibrating at the same rate as some of the electric
> signals in the cables and sampling device might cause audible interference
> in the result.

yep. no different than the 60 hz hum picked up on audio cables, or harmonics of the 60 hz hum picked up in the AM radio band.. or the ingress filters put at the beginning of coaxial cable runs through prevent leakage from shortwave and local radio stations into the cable network..

im sure it can be solved by just doing your recording in a room whose walls are made of about 2 " of lead..
Received on Sat Aug 26 04:15:05 2006

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