Replaced two bad SID's one with a nano Swin and the other with BackSID (from Backbit) and both work well. The BackSID has support for paddles and mouse whereas the nano swin does not. If I had known the nano swin did not support the paddles and mouse, I would have gotten 2 BackSID's instead. I am not a Commodore music/SID sound expert at all but both seem pretty close on this test
commodore.software
Any simple suggestions for testing? I could try to post sound samples.
Commodore Software - Commodore 64 SID Tester
SID Tester for the Commodore 64 by Andrew Challis is a nice BASIC program for testing all of the SID chips voices. You can find some more info and ...
commodore.software
Any simple suggestions for testing? I could try to post sound samples.