[LAU] Noise update, still the case with the other interface

[Folderol]

On Mon, 21 May 2007 11:10:46 -0700
Ken Restivo <ken at restivo.org> wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> The M-Audio Audiophile interface produced just as much noise as the Edirol FA-66 did. However, the amp I borrowed was buzzing even with only a regular (Korg) keyboard plugged in, so the problem may have to do with the amp.
> 
> I also noticed that this laptop's analog video output produces some nasty warbling/ghosting on my external monitor. Looks like rain falling or fog travelling rapidly, especially with dark screen backgrounds. Dunno if that's an improper X setting, a problem with the monitor, or or maybe this laptop is just generating way too much EMI with the Core 2 Duo's 2.33Ghz clock? I hope that's not the problem-- that is one of the few things I cannot change.
> 
> I've going to buy a keyboard amp, to isolate that variable at least. Off-topic, perhaps, but any recommendations? Most keyboard players I've seen recently seem to have Roland wedge-style keyboard amps. My local store carries the Peavey's (KB4, etc).
> 
> Thanks Pieter and others for links about noise mitigation. I'll try those suggestions too once I get the amp situation squared away.
> 
> - -ken

Have you thought of plugging in nothing except a battery operated
headphone amplifier? With no external earth loops and a high immunity to
EMI pickup this could prove very revealing.

-- 
Will J G