Dak, you're just picking up the random RFI of the world when you've got a cable hanging out in free air like that. There's no way around it unless you feel like building some sort of really elaborate filter that, in the end, isn't worth the bother. I routinely hook my laptop in when on my CBus-CTown trips, and I've noticed that despite having two ferrite beads clamped around both the AC and DC segments of the power cord, the switching noise coming through from my power inverter still gets through to the audio output. Unplug the power, and the noise goes away. Annoying, yes, but even at volume level 15, I can't hear it anymore because the amount of music (signal) far outweighs the inverter scatter (noise).

Someday I might even beat that wascally kenny!

No whammies... no whammies... no whammies...