I am using a Zoom Q2n HD camcorder for vocal and keyboard(not wired in). I tried direct record and I had a feedback problem, also tried using a good Sennheiser mic plugged into the 1/4 jack of the Yamaha.

I am sure you are right about procedures. Thank you.
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pa4X 76 ,SX900, Hammond SK1, Ketron SD40,Ketron Event X Centerpoint Space Station, Bose compact