Contact microhone placed on metal plate. Light tapping and scratching by hand, in the second half scratching by another thin metal tool. Vacuum tube amplifier with contact microphone.
Originals made with these tools :# fl studio 11# adobe premiere pro cs3# boss digital studio br-864# microphone sony f-730# harman kardon 20 in analog system# suzuki electric guitar sls-50bk# keyboard casio.