What's the modular system in this Can video from 1975?

huron · 2021-01-11T14:35:42.772Z

Can anyone ID the modular setup used by Irmin Schmidt in this performance of Vernal Equinox on Old Grey Whistle Test?

s_hamann · 2021-01-11T14:57:19.310Z

It’s actually a custom effects box he called the Alpha 77. There’s a bit about it at the bottom of this Sound on Sound article:

huron · 2021-01-11T16:30:23.999Z

Oh nice! Thank you for that!

timp · 2021-01-18T21:13:38.575Z

This is fascinating, thanks for drawing attention to it.
Can we try to ID each part?

mzero · 2021-01-18T22:26:20.431Z

OMG… that is an actual pop-top vest!!!