I've been using an actuator coil from an old hard drive to 'eavesdrop' on the electromagnetic signals emanating from various gadgets. The hard drive in my laptop, for example, sounds almost like guitar feedback. Eventually I sent the output of each loop through a filtered distortion, then through delays and reverb, as I usually do. The whole mess sounds like layers of fuzzy, synth-like feedback, but one of the loops captured some sort of a bump, for lack of a better descrition. This bump became the sparse bassline of this improv piece.