[LAU] sortof OT -- ART tube pac preamp and compressor noisy?

Fons Adriaensen fons at linuxaudio.org
Mon Aug 12 15:19:26 UTC 2013

On Mon, Aug 12, 2013 at 08:05:24AM -0700, Rusty Perez wrote:
> Anyway, I'm hearing a low level hum, sortof like a grounding hum.
> Does anyone else use the ART line of pres? Has anyone had trouble with them?
> The unit uses 2 tubes and I'm sure they aren't high quality tubes.
> Could a lower quality tube cause a low level ground hum?

The tube itself, no. The power supply, yes.
> The unit has a grounded plug, and I can't seem to get rid of the hum
> by unplugging other components, but when I mute the unit through my
> sound card, the hum is decreased.  The hum is audible in silences on
> my tracks, so I know it's not just my playback system.

Which sound card is the preamp connected to, and how (type of
input, cable, etc.) ?



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