Dekmantel regular Matrixxman returns with the third, and final installment in the Sector series, Part III: Polyphony. In this triptych, the producer from San Fransisco sets out to highlight the key components behind the sounds and style of techno, exploring the range within the confines of a particular limitation. Following Parts I and II, which looked at Rhythm, and Acid, Charles McCloud Duff charters the realm of Polyphony with four, meticulously produced techno tracks, expanding his repertoire of cult, dancefloor music.

Polyphony refers to the simultaneous combining of many notes in a musical sequence. In electronic music, this specifically refers to the role of the synthesizer, which can produce different pitches simultaneously. Polyphony has been an integral characteristic of the genre's sound for over a quarter of a century, and can be heard in many key records, living a the sonic forefront of these four tracks.

"Sector Series: III Polyphony" provides an exercise in melody and polyphony. Throughout the EP, swaggering rhythms are inter-washed with a sea of multi-melodious, reverberated notation. 'Initiation' resonates with the grandiosity, and harsh claustrophobia of early Underground Resistance. 'Access Granted', drives hard with pulsing effects, with a dystopic, rhythmic cacophony of euphony. 'Desert Planet' plays around with a differing tempo, imagining a more fantastical vision of music, echoing back to earlier Plastikman productions, using a vast sonic spectrum to conjure up a colour palette of alien imagery. 'Horizon' rounds things off; a track that builds on minimalism with a progressive composition, allowing the polyphonics to drive the track, harnessing the adept production qualities that Matrixxman has come to be recognized for.