Pieter Palmers wrote:
Ken Restivo wrote:
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I plugged my spiffy new linux laptop into an amp tonight and used it
as an instrument with a band, using an M-Audio Axiom49 as a MIDI
controller.
Not everything works yet on this new machine, but what I needed most
for tomorrow night's show (specimen, with a couple specialized
samples), worked fine.
Except for the noise. The FA-66 was producing the most awful, buzzy,
glitchy digital background noise.
I ran the following chain, and got horrible aliasing noise: Laptop ->
ExpressCard Firewire -> FA-66 -> SWR bass/keyboard amp
The FA-66 is powered by its wall-wart, since the ExpressCard doesn't
power it (even though it is a 6-pin connector).
My question is this. What's up with that awful noise?
When googling around I found at least one other person having the same
issue with the FA-66.
I've noticed similar noise at some places with my QuataFire line out's.
Some things to try:
- unplug the power supply of the laptop (for test)
- put a DI box inbetween the amp and the edirol (enable ground lift)
- use another power supply for the edirol (preferably a transformer
based one).
http://docs.info.apple.com/article.html?artnum=86655
Pieter
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