Tonearm weight – Did you set up the weight properly for each tonearm?
• Ground noise – Switch your mixer to hear the actual timecode from the record and verify there is no ground noise mixed in the signal. • Ground loops – Make sure your system is free of electrical ground loops as this can interfere with the timecode. • Cable connections – Check that your cable connections are tight and that you are receiving stereo signals on both channels of the ScratchAmp. • Monitor interference – If you work in a club with loud monitors it could be that vibrations are interfering with the timecode. In this case, be sure the turntables are placed on something to absorb the vibrations such as rubber foam, etc.