Re: What Mid-range USB Sound Cards Work with Linux?
Joe <joe@jretrading.com> writes:
> For recording, good signal to noise ratio is important, and the four or
> five internal cards I've used over the years have all been very poor in
> this respect, maybe in the low 40s in dB.
>
> USB devices I've tried have had much less noise, particularly if the
> audio ground side is linked to the tower case independently of the USB
> cable.
The inside of a P.C. case is a hostile environment when
it comes to EMI (Electro-magnetic interference.)
The worst issues I have had are ground loops between the
P.C. case and other grounded devices in which there are a few
millivolts of AC difference between the two so-called Earth
connections. That is why recording studios and broadcast stations
usually use ballanced lines for all their audio connections.
Martin
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