AW: format filter bank/string filter

[Haible Juergen]

	>Aah, that mysterious string filter. Supposedly there has been a
thing
	>like the "Moog String Filter". 
	>The liner notes of Jon Lord's "Before I forget" album mention it on
a
	>couple of tracks, together with the Polymoog. Since the Polymoog
alone
	>wouldn't come close to that marvelous sound at all, I suspect that
string
	>filter to have been a Solina like chorus circuit. Can anybody shed
some
	>light on this?

A picture of this can be found in one of these books about
analogue synthesizers. I think it's in this "Museum" book
(don't know the exact title; the one with the ugly front cover,
mucho typos, but great photo collection - you know what
I mean ...).
It's a large box, 2 (or 3 ?) HE 19" rackmount, but it only has a
few rocker switches on the frontpanel to select several
presets. The "stradivari output from sine wave input" is
surely a hype, but I guess there must be a lot of circuitry
inside, as they chose such a large box ...
I'd love to see schemos for this, but my search was in vain
so far.

For an excellent stand alone "Solina" type chorus, look
for a "Dr. Boehm Phasing Rotor 78". Maybe you can find
one, especially in Germany. I got mine a few years ago 
for less than DM100,- , but I think it's worth 5 times as much.
It uses three BBD lines (TDA1022), and the usual dual
three-phase LFO for modulation. I don't have a Solina
for comparison, but I do have 2 other String Ensemble keyboards
(Korg Lambda, Crumar Performer), and the "78" produces
similar lush string sounds from a rather boring pad-type
input signal. (And with the OB-8 as input signal, it beats
them all (;->) )

Ok, I disgress. This was string ensemble related, but I don't say
that the Moog String Filter does include such a multiphase chorus.
Truth is, I don't know.

JH.