Re: [linux-audio-user] Pre-Amp hum (related to jack, somehow)

From: Steve Fosdick <lists@email-addr-hidden>
Date: Sat Dec 02 2006 - 01:24:55 EET

On Tue, 28 Nov 2006 17:36:27 +0100
"Marc-Olivier Barre" <mobarre@email-addr-hidden> wrote:

> I also ran into some problem with my laptop. Those things are known to emit
> a lot of EM waves which easily get caught by cables transmitting asymmetric
> signals. When I switched all my connections between my sound card (RME) and
> my pre-amp (TL-Audio) to symmetric XLR, the hum disappeared.

I had a hum problem with a Tascam US-122. I wanted to record a singer and guitar that had an integrated pickup. The singer's mic was a condenser and so needed phantom power so I had phantom power on, but I also had the guitar pickup plugged into the other channel. If I turned phantom power off the hum went away.

I haven't had the problem with balanaced line either and in the end we just went for a second mic on the guitar which avoided the hum.

Steve.
Received on Sat Dec 2 04:15:02 2006

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