Martin Birch, who served as the audio engineer for the album, recalled that Green would frequently come into the recording studio with a demo recorded at home on his
Revox. Once Birch familiarised himself with the general feel of the song, the rest of the band would record the basic tracks. He said that the other members would then leave the studio, leaving himself and Green to work on the song until all of the parts were recorded. He repeated the same process with Kirwan and alternated between the two songwriters until the album was complete. Several of Kirwan's tracks, including "One Sunny Day", "Without You", and "
Coming Your Way", were originally recorded on 6 October 1968. At the time, "Coming Your Way" carried the
working title "Going My Way". These songs were later re-recorded and remixed for
Then Play On, with sessions for "Coming Your Way" and "Although The Sun is Shining" beginning in April 1969.
Christine McVie, who at the time was known by her maiden name Christine Perfect, played piano on "Coming Your Way". Kirwan played all of the guitar parts on "Coming Your Way", "My Dream" and "Although the Sun is Shining" as Green wanted him to become more independent and proficient in the recording studio. His compositions "One Sunny Day" and "Without You" emerged from the same recording session as "
Albatross", which was completed when the band were still signed to
Blue Horizon. Green's friend Paul Morrison remembered that Green spent a considerable time working on tracks alone. Morrison also said that Green would occasionally prevent the rest of the band from entering the recording studio so that he could overdub guitars, bass, and drums himself. Some of Green's timpani-playing appeared on "Oh Well", which appeared on later editions of
Then Play On. Green was involved with the editing and cutting of these songs and spent time reviewing the tapes; he would then provide feedback to Birch, who mixed the tracks. The Madge jams were named after a fan of the band who hitchhiked to several of their shows. "Fighting for Madge" was pieced together with two pieces of tape and "Searching for Madge" required the splicing of five snippets of tape taken from an extended jam session. "Searching for Madge" also included an audio clip of someone chuckling, portions of a sped-up and reversed segment from "Underway", and an orchestral recording. A 16-minute version of the Madge jam was later included on
The Vaudeville Years. Much of the album's mixing was conducted by Green and Birch. When the two were working on the two Madge jams, Birch employed
panning on the guitar tracks to create the impression of a "guitar duel" between Green and Kirwan. ==Release==