my Asynch-1 used to work powered by USB bus. now just error and not recognized.
I tried the Win10 drivers - pretty sure win10 will support this native now?
I can try a power supply, not sure about voltage?
I have this power supply with 6VAC and 16VAC available, not sure if it needs DC?
http://www.schiit.com/products/floor-wart
async_win10.jpg