when i tried this with a 9v adapter it powered up but did not play the notes properly at all...after a while i got frustrated and turned the multi adapter up to 12v and it now works..????
Is this something to do with the psu i am using..? I just found out it is supposed to be 500mA but this one is 1200..!!!!
Also when i touch any switch it makes a horrible buzzing noise...
Thanks in advance..Graham.

