Youtube user wouter van Veldhoven has posted a fantastic video of a tape delay setup using a modular setup and four reel-to-reel tape machines.
Techniques shown here include:
Looping, Delay, Reverse Delay and Saturation.
Way to go Wouter, you rock.
Its easy to forget that only a matter of decades ago, this was a technique used extensively in the creation of electronic music.
Worth checking out Wouter's channel for some more electronic madness.