[sdiy] an old serge UI secret and a primordial question

[Anthony Bisset]

For years i'd wondered why the old serge systems have 2 outputs per
module given that banana's are naturally multing...  Tonight i understand.

It was a performance related provision.  If you've got a sound at an
output and you want to take it somewhere else and then disconnect the old
signal flow without losing continuity, you need 2 physical patching
points.  Multing would leave you with buried cables that could not be
disconnected without losing the signal or you could have hanging cables by
disconnecting at the input ( obnoxious ).  So, having 2 outputs makes
sense for a live performance system.

Now, i've been fascinated with phase differences between speakers creating
a sonic terrain within a room.  To experiment more with this concept
during performances I'm wanting each modules second output to be out of
phase..  90 degress seems optimal, so just an opamp would do the trick,
but there might be some simpler way.  Anyone have any suggestions for the
simplest fixed phase shift circuit?

Is there a type of transformer that will give me 90 rather than
180degrees?  without too much hf roll off?  Will a R/C combo accomplish
this better?  So trivial google couldn't find it.

-anhotep