From the Bandcamp Oliver Barrett page:

Solo cello improv. Single take. One mike.

Tracks 1 and 5 recorded on an Olympus LS-11.
Tracks 2, 3 and 4 recorded directly from pick-up into a 1960's 'Sun Ace' BOT-440 reel-to-reel tape recorder.

Cello and a small amount of reverb on 3.
Cello and 30cm plastic ruler and a broken metal coat-hanger on 4.
Also fucked around with the tape a little on playback on 4.

Track 1 recorded at the Cafe OTO Project Space. All the rest recorded at home in Stepney.