Sunday Synth Jam: This live performance, by Fahmi M. features live looping with a reel to reel tape recorder.

Here’s what Fahmi M. has to say about the technical details:

Macro-oscillator module synth sound and field recording samples recorded to tape loops, play on tapedeck, process to effect pedals (looper, eq, delay, reverb). Create ambient music, build sounds of reel to reel tapeloop, looping layer by layers, like architecture.

“I discovered that the most interesting music of all was made by simply lining the loops in unison, and letting them slowly shift out of phase with other.”
– Steve Reich