Thanks for your answer.
I hope so , its normal , its really like a train in the background riding , when you detach the touch knob , its gone
butt you only here it if you softley touch the key.
I try it in the store to another psr , and its the same , maybe a bad sampling of it.
Maybe someone to help with the good Master EQ settings to use , yours are the experts who have a longer use of it.
i am a newby to my Psr 975.
Many thanks in advance four your help.
Best Regard.