What is "samchillian"

The Samchillian Tip Tip Tip Cheeepeeeee (or samchillian, for short) is a type of electronic keyboard instrument invented by Leon Gruenbaum, that uses keys to trigger melodic intervals aka changes of pitch rather than the traditional fixed pitches.

The Samchillian is listed as a "non-traditional" MIDI interface according to the MIDI Manufacturers Association. According to this source, patent #5,565,641 is applicable to the device.