Elektron Musical Instruments

Well, if I get a good firm grip on the aluminum side of the indigo and 
touch the metal plate firmly on the machinedrum it demonstrates that 
there is a groundloop between the midi out of the MD and the midi in of 
the Indigo... the loop becomes most obvious when something is going out 
the midi out when all signals, including hitting the MD transport 
buttons, make a little click/chirp.

So long as I have them, I don't want to choose between the two - but 
the problem only exists (as far as I can tell) in the configuration I 
want to use.  The indigo is not nearly as good of a master as the MD, 
but the MD syncs to the indigo without anything making any extra hums.  
It seems to be just between these particular ports.

So a) how do I just kill the loop?  b) which manufacturer do I contact 
about this first?

The room I have the items setup in is in about as bad of grounded 
electricity as any other average house, and I almost always lift the 
grounds of items I've got on.  In this case the loop is not occurring 
with electricity, so ground lifters don't make any difference.

Thanks,
Chris