Particles is the first issue of the so-called 'double cupdisc' series. It comes with a gatefold cardboard sleeve and contains two CDs:
The first disc, titled Muon, consists of three tracks: First one is a completely improvised track of almost 30 minutes running time that Thorsten Quaeschning, Ulrich Schnauss and Hoshiko Yamane recorded in the studio of Dieter Dierks, the very same studio where 45 years ago three young men who called themselves Tangerine Dream recorded the albums Alpha Centauri (1971), Zeit (1972) and Atem (1973). Second track is a cover version of the main theme from the TV series Stranger Things. The original series soundtrack by the US band Survive is heavily inspired by TD's soundtracks of the late seventies/early eighties. Last but not least, the third track is a complete remake of side one from TD's classic album Rubycon (1975).
The second disc has the title Tau (which, like Muon, is the name of an elementary particle, similar to the more commonly known Electron) and features five tracks recorded live during the Schwingungen Festival in late summer 2016 in Germany.
A short time after its CD release this album became available as MP3 download at the Tangerine Dream Download Shop as well.
In June 2017 Particles was re-released as double CD as well as double vinyl album (with slightly altered track order) by Invisible Hands. A short time later a pirate release, apparently from Russia, was discovered; it shows the same order number as the official re-release but consists of one CD only, omitting the last of the originally eight tracks.
2CD [a]: eastgate 077 CD; multicoloured discs; matrix codes: 077 CD1 and 077 CD2; gatefold cardboard sleeve; no order number on disc or inserts
Download [a]: complete release or individual tracks as MP3