Many clues about the equipment for the production of "Collapse EP" are present in the video frames of the 2018 track titled "T69 Collapse". These frames are images that represent the transcription of the Cirklon sequencer files system about the synthesizers used on each Cirklon midi/cv channel tracks.

According to this book Vangelis used a Yamaha CS40M.

"We were bringing out some of these old synths that we hadn’t used — the Minimoog and the Yamaha CS-40. We’ve always used the Roland Jupiter-6; it’s pretty much a workhorse. It was getting back into that world."

Per "Rock This Town" publication, special issue 1991:

In 1991, the setup was as follows: [Rock This Town special issue 1991]

Sound studio: Analog Synths: Roland System 100/100M/101 (+Roland Midi interface MPU-101);YAMAHA CS-40M (in the Take One video); Oberheim Matrix 1000; Digital Synths: Yamaha DX-7 (2); Ensonic VFX; Roland DDR30; Yamaha tg77; Korg Wavestation; Sequencer: Atari 1040 (Sequ. Cubase 2.0); Samplers: AkaiS9000 (2); AkaiS1000 (8Mg + Hard Drive Mfile 44); AkaiS1000PB (4Mg); Emulator II; akai 1100, e-mu Procussion, roland s-10 for live use @ the mixing desk; Effects: Lexicon 480L; Yamaha SPX90 II (2); Roland SRV-2000; Roland SDE-3000; Alesis Midiverb II; Alesis Quadraverb; ART DRX; spx 1000 (x2); Eventide h3000 se; Mixing: Table TAC Scorpion 32/16; Recorder TASCAM MS16 tracks; Recorder DAT Luxman; Speakers Yamaha NS 10M pro ATC SCM50; QUAD ampli (for NS-10M); Diverse: compressor/limiter, noise gate, parametric eq. Live: Backline: Akai S9000; Roland DDR30; Simons & Roland Pads; Emulator II; TASCAM238 8

Graphic Studio: Commodore Amiga 2500 (6Mg + Hard Drive 40Mg); Commodore Amiga 500; Digitizer SNAPSHOT; Camera Sony CCD V-200E; Laserprint NEC Silentwriter LC890; Monitor NEC Multisync 2A.

the CS-40m can be seen on page 1 and 2

can be seen centerstage on TOTP infront of Midge Ure, it was supposedly also used by Ultravox for the refrain of "Vienna" and at the beginning of "Western Promise" and during the later parts of "Sleepwalk"

The Yamaha CS-40m is visible in the background of a photo featuring Dr. Luke, as shown in the user-uploaded image on Icymag.

Luke Million uses a Yamaha CS-40m to play the synth brass part in his rendition of the Blade Runner End Titles, as seen in this video from his studio.

These are the synthesizers that the Radiophonic Workshop had back in 1985.

The credits for the album, Between Orient And Accidents, list the Yamaha CS-40m.

"I've been working on a programme called 'An Alien's View Of Earth' which involves a lot of slow motion footage. The Yamaha DX7's been ideal for that, because it can produce some slowly developing organic sounds. In this studio I've also got a Roland Jupiter 4, a Yamaha CS40M and some Wavemaker modules with an EMS DK2 keyboard. The Yamaha was quite useful when we got it, because although it was only duophonic it had programmable pre-sets and a cassette dump for sounds. Elizabeth Parker did some of the sounds for Blake's Seven on it, which was one of the first things she did at the Workshop."

Used on Kimiko Kasai and Herbie Hancock's Butterfly, as specified in Herbie Hancock’s Electronic Instrument Glossary from September 14, 2016.

Yamaha CS-40 – Released in the late 1970s, this analog synthesizer could be played as a two-note duo-phonic instrument or be used in ‘unison’ mode which allowed for monophonic use. Webster Lewis used this instrument on the 1979 album Kimiko Kasai With Herbie Hancock: Butterfly.