-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
On Mon, May 21, 2007 at 07:45:29PM +0100, Folderol wrote:
On Mon, 21 May 2007 11:10:46 -0700
Ken Restivo <ken(a)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.
It sounds fine with headphones, and also sounds fine going into my at home stereo: quiet
and lovely.
However, my stereo is *not* grounded: it has only a 2-prong plug.
Likewise, the wall-warts for both the FA-66 and the Audiophile are not grounded. Maybe I
should try to find a grounded wall-wart?
How I wish these things were powered by their USB/Firewire cables!
- -ken
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (GNU/Linux)
iD8DBQFGUeuhe8HF+6xeOIcRArTgAKCI0xJ1rdKW4ouD6/VdM25P2VEj5gCg77ny
XmtIDXuVpFTl18SoLHO+MgU=
=TVsb
-----END PGP SIGNATURE-----