Long story short, I was running the board at a friends home studio. we were recording dialog voice over content to a single track. First two tracks went great. Then I armed for track 3, hit record and we immediatly hear a low hum on the track. Not enough to stop us but enough to have to use post production processing to remove a 60 Hz hum from the track. Same thing happen on the final track 4.

How could this happen in the middle of our recording session. Nothing was moved and nothing was changed.

Dan


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