I just reveived Yamaha's mic cable adapter wiring diagram from Leo, and guess what--it's dead wrong. Every diagram shows an XLR cnnector with pin #2 as the hot wire and pin #3 grounded. I checked every mic I have, which is way too many, and all have pin #3 as the hot pin--NOT GROUND!

I also checked with the local tech and he said "Pin #3 is always the hot pin, at least on every mic we sell at the store, and even if it has a floating output, pin #3 is still hot. If you were to ground Pin #3 with a floating output, this would cause distortion, especially if you were singing at a high level."

Additionally, Yamaha's keboard wiring diagrams, at least the PSR-2000, 740 and 3000, show a mic input jack that is a standard, 1/4-inch, mono plug--not a TSR.

Hope this is of some benefit to those experiencing problems,

Gary