[LAD] [LAU] Computer noise, was: Ardour MIDI tracer

Ralf Mardorf ralf.mardorf at alice-dsl.net
Sun Aug 17 02:21:09 UTC 2014

On Sat, 2014-08-16 at 20:17 +0200, Dennis Schulmeister wrote:
> On Sat, 16 Aug 2014 18:21:52 +0200
> Ralf Mardorf <ralf.mardorf at alice-dsl.net> wrote:
> > Increase the volume and you will hear digital noise from the analog IOs
> > of a card inside of the computer. Move the mouse and extra noise will be
> > audible, no MIDI is needed to get annoying noise. MIDI noise is very
> > silent compared to mouse noise, but there is some noise.
> That's exactly the noise I'm talking about. With ground-lift it goes
> away. At least it did for me.

I'll keep it in mind and test it someday. The idea of a DI-box between
analog out from the sound card and input of the mixing console is
strange, but that's were the problem appears. Parasitic noise might
disappear, but transformers of a DI-box likely will have negative effect
to the sound quality. Is there a DI-box without negative effect to the
sound quality?

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