The forum is full of postings from people that have USB noise problems on microphone systems.The ART preamp you have is USB powered. I wouldn't bother with batteries or an external supply.
http://kozco.com/tech/audacity/clips/Fr ... itoes3.wav
Koz
The forum is full of postings from people that have USB noise problems on microphone systems.The ART preamp you have is USB powered. I wouldn't bother with batteries or an external supply.