EXS 24 Logic Sampler Users Group

Hi Roland,

The easiest and cheapest way to fix this is by connecting a 'ground 
loop isolator' between the audio output of your Mac and the console.
If you use the inputs of your Mac as well, then you should use such a 
device there as well, but I would advise to try the output first and 
leave the input disconnected.

Most cheap ground loop isolators come in a smal enclosure with two 
little transformers in it and fixed leads.
See, for example:
http://www.radioshack.com/searchsku.asp?find=270-054/

You could of course also get an audio interface from, for example, 
M-Audio.

Regards,
Ernst.