including his album Security (1982) and the Birdy soundtrack (1984). He had an inexpensive studio in the adjacent barn consisting of two rooms, one where Gabriel would produce his vocals and work on lyrics, and another where the music would be assembled. Preparing for So, Gabriel considered Bill Laswell and Chic's Nile Rodgers as potential producers. He eventually asked his Birdy collaborator Daniel Lanois to stay at Ashcombe and work with him further. Rehearsals began in May 1985 and consisted of Gabriel, Lanois and guitarist David Rhodes. Gabriel had begun work on some songs and provided Lanois and Rhodes with chord structures, around which they improvised compositions. Lanois recalled they had "a nice starting point [as] in that kind of scenario, it's not a good idea to have a lot of people around because you get nervous that you're wasting other people's time". Consequently, there was a relaxed atmosphere surrounding these sessions and the trio would jokingly refer to themselves as the "Three Stooges". This also involved the wearing of construction site hard hats as they had a "turning up for work humour". As sessions grew, engineer/mixer Kevin Killen, bassist Tony Levin, and drummer Jerry Marotta became significant contributors, and were aided by percussionists Manu Katché and Stewart Copeland and violinist L. Shankar. The studio's basic equipment consisted of "two analog 24-track machines, a Studer A80, and a Studer A80 shell that had been modified by a local electronics wizard, with its own audio cards and transport controls". To record vocals a Neumann U47 tube microphone and a Decca compressor were used without equalization. All of Sos songs were made in a similar format. Gabriel would record demo parts on a modified "B machine" - using mainly a Yamaha piano and Prophet-5 over a Linn 9000 drum beat - and play this to the band. During rehearsals, the band would listen to the B machine through headphones and record their output onto the "A machine"; parts of Gabriel's demo would also be transferred to the A machine at this stage. Subsequent takes of the song were then put onto the B machine in order for the band to hear what they had played with the demo, as well as the song's new and old takes. Other equipment included the "groundbreaking" Fairlight CMI synthesizer, which Gabriel said in an interview for Billboard meant "more human imagination is involved". He added, "the