When asked in this [reddit thread](http://www.reddit.com/r/edmproduction/comments/1vagak/i_am_optical_ama_virus_recordings/) what kind of equipment Optical uses, he responds: "I have owned (and still do mostly) as best as I can remember: Mackie 32/8 32 channel - (I have had 3 altogether), 3 x [Emu E6400 Ultra](http://equipboard.com/items/e-mu-6400-ultra) (also [E6400 orig](http://equipboard.com/items/e-mu-6400)), Akai S750, S900, [S1100](http://equipboard.com/items/akai-s1100), [S3000](http://equipboard.com/items/akai-s3000xl) samplers, Alesis Quadraverb, [Focusrite Green Eq](http://equipboard.com/items/focusrite-green-eq) x2, Focusrite Green Compressor, [Focusrite ISA430 Producer Pack](http://equipboard.com/items/focusrite-isa430-mkii-producer-pack), [Lexicon Alex](http://equipboard.com/items/lexicon-alex-digital-effects-processor), [Lexicon MPX1](http://equipboard.com/items/lexicon-mpx1), [Alesis MidiVerb4](http://equipboard.com/items/alesis-midiverb4-dual-channel-parallel-processor), [TC Electronics Fireworx](http://equipboard.com/items/tc-electronic-fireworx-multi-effect-processor), [TC Electronics Finalizer](http://equipboard.com/items/tc-electronic-finalizer-plus-studio-mastering-processor), [Joe Meek VC1](http://equipboard.com/items/joemeek-vc1-studio-channel), [Drawmer MX40](http://equipboard.com/items/drawmer-mx40-pro-four-channel-punch-gate), [Sherman Filterbank](http://equipboard.com/items/sherman-filterbank), [CryBaby Wah Pedal Boss Pedals](http://equipboard.com/items/dunlop-cry-baby-wah-pedal) - Too many, [Novation Basstation](http://equipboard.com/items/novation-bass-station), [OSCar](http://equipboard.com/items/oxford-synthesiser-company-oscar-synthesizer), [Sequential Circuits Pro1](http://equipboard.com/items/sequential-circuits-pro-one-synthesizer), [Prophet 5](http://equipboard.com/items/sequential-circuits-prophet-5), Wurlitzer, PPG Wave 2.1, [Neumann TLM 105](http://equipboard.com/items/neumann-tlm-103-condenser-microphone)*, Fender Strat 1972, [Oberheim/Viscount GM1000](http://equipboard.com/items/oberheim-gm1000), [Korg Z1](http://equipboard.com/items/korg-z1), [Kawai K1r](http://equipboard.com/items/kawai-k1), Otari Status 16R Mixing Console with Eagle Automation. [BSS DPR-402 Compressor](http://equipboard.com/items/bss-dpr-402). and more I can't recall right ow ;o)." *The Neumann links to the 103 because the moderator who approved this post believes Optical wrote 105 by mistake. If anyone believes this to be in error, please follow up in the comments section so that we can adjust :)more
From the FAQ page found on The Enigma Archive: "From the credits of various albums, it is known that Michael Cretu uses or has used the Waveframe 1000, Audi Frame Workstation, MIDIMoog, PPG System, Korg M1, C-Lab Notator, Takamine 6 and 12 String, Tom Anderson Electric Guitars, Otari DTR-900, Akai 900, Linn 9000, Prophet 2002, X-Pander, EMS Vocoder, DX-7, and Roland Super Jupiter."more
I acquired my S900 from the then manager of Swan Yard Studios just as they were closing back in 2002, it had been used on countless recordings in the 80's and 90's along with an Oberheim Matrix 6r i bought and an Oberheim DPX-1, none of which i own today. The S900 was very similar to a later S950 i owned from what i can recall.