Designed and built by Andrew Mowry of Oregon, who was advised by Michael Eskin (NB¹: ➺ Eskin bagpipe apps); According to Wikipedia it is "a very interesting and innovative MIDI-capable pipe with an optical chanter which can jump the octave, though it lacks the "on-board" voice and speaker of some models"; NB²: Mr. Mowry informed me that its name is in fact a derivation of the verb "warble" [to sing ...]; NB³: Compare Warbler; NB⁴: ➺ Electronic pipes (Sources).