Fons Adriaensen wrote:
Noise is there
whether the printer is turned on or not. It disappears
only when one or another of the cables are disconnected.
Then it's probably not related to interrupts etc.
Are you sure the ground connections of your audio cable and
amplifier are OK ?
Sure, they've been fine, I've had no similar trouble until I added this
printer (recommended by
linuxprinting.org).
I haven't tried switching the M-Audio card slot yet, it's my next move.
Best,
dp