227r - System Interface

Some initial tests of a Buchla format 227r.
This is a early rev1 that uses vactrols. It's been many years since I first purchased the PCBs but finally it's working with the help of Dave Brown and his wonderful site ModularSynthesis.
http://modularsynthesis.com/roman/buchla227/227si.htm

#227r #buchlaformat #systeminterface First tests of the 227r.

A post shared by jono (@dj_jondent) on Jan 26, 2018 at 2:09am PST

Information on this module is rather scarce.

These days music is generally played in a stereo format but the 227r is all about Quad Sound.
It's quite a wonderful module. The 4 inputs can be assigned to 4 speakers (2 front, 2 rear at the four corners of your room). This is all voltage controllable.

All the sounds are patched out via the card.

I'm considering making a breakout cable so this card doesn't have to be left plugged into the patchbay.
I'm concerned the weight of too many cables could cause damage.

Another option is a make a preconfigured patch card:

This patches my chosen outputs through the Tape1/2 & Aux1/2 at the front of the module.