This is a collection of sounds that rattle, clatter, vibrate, buzz, hum and oscillate. Think huge cargo vehicles, passenger ferries or mechanical installations with loose metal panels, resonating generators and such. The vibrating was done with a 100 watt tactile transducer (like a bass speaker with no cone) hooked up to an amplifier, and getting it’s signal from a modular synth. Frequencies from LFO’s and VCO’s were mixed, to get interesting vibrations in both sub-audio and audio range.
Holding the transducer by hand allowed me to move it around and find the sweet spots on the various objects (a steel filing cabinet, a steel suitcase and a spring reverb tank come to mind). Depending on the amplitude of the input signal, different sounds would emerge from the same waveforms. Now and again, the transducer would get too hot to handle, and on one or two occasions, the thermo-relay on the amp would kick in. Excitement in the studio!
