frequency sweeps on multiple strings ranging from 30 to 50 inches in length. Freq sweeps are generated and imparted onto metal strings via a custom amp circuit resulting in a 1-2 amp signal passing through an electromagnet. Dual humbuckers at the opposite end of each string pick up the resulting signal, which is essentially a derivative form of spring reverb. I interrupted the liner/log sweeps at times to explore sonically rich areas.