Inside this repurposed slide case are eight individual square-wave oscillators triggered by a built-in eight-step sequencer, as well as a stepped-tone generator that can drone or flash in sync. A low-pass filter allows the high-end to be rolled off. Two individual volume controls, one for the eight oscillators and one for the stepped-tone generator let you blend the sound of each.

This device has some very subtle yet enjoyable crosstalk.

Powered by 9-volt battery or wall adapter. Audio output via a 1/4″ jack. The old metal case is extremely durable regardless of a few cometic imperfections.