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On Mon, May 21, 2007 at 07:45:29PM +0100, Folderol wrote:
> On Mon, 21 May 2007 11:10:46 -0700
> Ken Restivo <ken@email-addr-hidden> wrote:
>
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> > 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
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Received on Tue May 22 00:15:06 2007
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