I am using zero sequences, I perform all the parts in real time including Bring The Boys Back Home and The Trial. To pull it off this was the minimal rig I could get away with. I have to play some parts with my feet on the Taurus pedals which is sometimes used as a MIDI controller. Everything is MIDI controlled, with all my MIDI configurations stored in the Kurzweil MIDIBoard. One press on the MB and I am ready for the next song.
All the board and modules (with exception of Andromeda with onboard FX and Taurus pedals) have independent stereo FX. The FX for the analog synths switch on the fly for each patch.
Boards:
Kurzweil MIDIBoard master MIDI controller
Hammond XK3/XLK3
Alesis Andromeda
Moog Memorymoog
Moog Taurus 3
Oberheim OBX
Racks from top down:
Rack 1:
FX for OBX: Korg SDD-3300 and Lexicon PCM60
Rack 2:
FX for Memorymoog: Korg SDD-3300 and Eventide 2016
Alesis Datadisk for sysex backups
JLCooper MSB+ MIDI matrix
Rans SM82S
Rack3:
Dynacord CLS-222 Leslie Simulator for Hammond
Rack 4:
Kurzweil 1000AX through Lexicon PCM60 (set to plate reverb)
Kurzweil 1000PX through Lexicon PCM60 (set to room reverb)
It is known that PF used the P5 and ARP Quadra on The Wall, but I am convinced that they also used the Oberheim SEM polysynth as my OBX nailed some of those sounds.
Because of the huge bass synth and orchestral parts, I had to haul my Bose PA system to reproduce the sounds.
High rez pics here
http://www.retrosynth.com/~analoguediehard/tour/epac-pink-floyd-the-wall-rig-6.JPG
http://www.retrosynth.com/~analoguediehard/tour/epac-pink-floyd-the-wall-rack-1.JPG