Yamaha DTXpress/DTXplorer/DTXtreme

> 
> Check all of your plugs (not the AC wall adapter).  Sounds like one 
of
> them is out or not fully inserted into a jack.
> 
> Jim

I have tried that..right now I have JUST the module plugged in with 
nothing plugged into the back of it..and I can insert the headphones 
into the jack and it hums in the headphones..and it hums out of both 
L/R 1/4" outputs on the back. 

Gary