Video walkthrough reveals rare 1982 Gleeman Pentaphonic 5-voice synth

MysteryCircuits’ video walkthrough, embedded on Synthtopia, has refocused attention on the Gleeman Pentaphonic, a five-voice polyphonic synthesizer from 1982 notable for an unusual three-oscillator-per-voice architecture. Synthtopia highlights that “It features three oscillators per voice, giving it a richer sound than many of the poly synths of that era,” and the demo frames the instrument as both technically distinctive and extremely rare.

The demo host identified as MysteryCircuits is available as an embedded video on Synthtopia and is mirrored across enthusiast sites. Matrixsynth posted a brief entry titled “Gleeman Pentaphonic Demonstration” dated Saturday, February 14, 2026, and a YouTube descriptor tied to the walkthrough reads, “Going through many of the features of this rare synthesizer from 1982 after repairs.” A short TikTok clip from Vintage Synthesizer Museum (@vintagesynthesizermuseum) showing Gleeman features is recorded in the dossier with 91 Likes and the partial caption “Discover the unique features of the Gleeman.”

Production and finish details cited in the writeups underline scarcity: Synthtopia states “Only about 50 Gleeman Pentaphonic keyboards were made, only 20 of which are clear.” That claim is repeated in the embedded demo materials and in aggregator listings. Community evidence indicates at least two finish variants exist; a Synthtopia commenter described a personal instrument as entirely black, noting “Ps. Mine is not ‘transparent/clear’ is all Black!”

A first-person acquisition and repair anecdote on the Synthtopia page supplies granular restoration detail and provenance color: “1. Have to share my very incredible history. Bought mine when ‘Bailey Brothers’ went out of business. It was the last day before final closing and it was found in a closed bathroom in the back of the storage room (which worked as the back room of the back room) where all the “‘un-sellable” crap ended. It was in a very…very bad shape…but since it was the last day and it look like crap (of course we tried to turning on w/o success). I paid $1.99 (StG)… turn out that it was only the PSU that needed to be replaced and some deep cleaning (it has dead roaches inside) and a little love and the synth has given me lots of fun and pleasure. The filter is somewhat not very musical…but can’t complain given the story that we have! Ps. Mine is not ‘transparent/clear’ is all Black! [...]”

Key claims in the current coverage warrant verification before they’re treated as settled history. The production figures “about 50” with “only 20 … clear” require confirmation from manufacturer records or collector registries; the exact 1982 release timing could be tightened with period catalogs or ads; MysteryCircuits’ upload date, view counts and full metadata, the identity of the YouTube repairs walkthrough, and the full TikTok caption and metrics should be confirmed. The commenter’s currency notation “$1.99 (StG)” and the filter assessment are anecdotal and subjective and should be corroborated with additional units or technical documentation.

For now, MysteryCircuits’ demo embedded on Synthtopia and the Feb 14, 2026 reflection on Matrixsynth provide the clearest public traces of the Gleeman Pentaphonic’s architecture, rarity, and a rescued life after repair; collectors and archivists will be watching for production records and definitive technical documentation to move the Pentaphonic from anecdote to confirmed chapter in early-1980s synth history.