AW: Some more ideas on Hammond-Synthesis

[Haible_Juergen#Tel2743]

> On the other hand, this one axle (let's say for semitone F#) is connected 
to
> the other 11 axles by gear reduction which should lead to an unstable
> relationship in phase-terms due to mechanical tolerances and losses.
> So: (quite) constant phase-difference between equally named semitones 
(e.g.
> f1#-
> f#- F#), floating
> free (or *very* 'soft-synced'???) oscillation of the other semitones in
> relation to our F# (e.g. F#- a).

Can anybody confirm this? Same semitones on one axis? Would make
things much easier indeed.
The Funkschau article also spoke about an option of building a
top-octave-PLL plus common dividers for the lower octaves.
I haven't looked it up so far, but it was a "Funkschau Sonderheft
Klangzaubereien" ("Funkschau special issue on sound wizardry")
It also contains the Doepfer analogue voice cards (CEM_based),
a HUGE multi-BBD delay project and other things I forgot.

>Juergens second-order PLL idea also seems promising!! Juergen did you 
already
>find out the bibliographic data of this Funkschau article?? Please let me
>know.

> So, "spring/mass-systems like tonewheels" (as Juergen put it) do certainly 

> belong to the 'long time instable, short time stable' group -

I am not sure - isn't it just the other way round? A PLL would have a 
perfect
division factor over a long time, but is free to oscillate around this 
factor
for a short time, if excited somehow.

JH.