[AH] Paia Synthespin?

[Paul Perry]

At 12:02 AM 10/12/98 -0500, Tim Johnston  wrote:
>Anybody know what a PAIA Synthespin is? 

There is a ckt for this (and other PA1A stuff) in
"electronic music curciut guidebook' Brice Ward Tab 1975
it isn't a REALLY rare book

Uses a LM3900 Norton quad.
Has a lfo driving a transistor to vary a bandpass filter,
the (out of phase) output from which is summrd with the input
to give a phaser effect.

SPEED this is the LFO speed control

ACCENT this is 'depth' or 'intensity' of efect

SPAN as far as I can see varies the freq range of activity

CENTRE I think is the centre of freq control, with SPAN at max 
you use this to 'phase' manually

There are SPEED and CENTRE CV inputs in the rear, with 0-9v range.

paul perry melbourne australia 
Frostwave Quad rackmount midi-cv convertor back in stock for Xmas ;-)