[sdiy] Farfisa VIP 500 modifications

[JH.]

The first Farfisas used sync'ed oscillators as dividers, with a different 
pulswidth (30% ?).

50% is cheaper (just a Flipflop -> integrated), and better when you want to 
make sine waves.
And the VIP 500's UP basically has sine wave (approximation) drawbars.
(That's why I also modified the percussion register to act as normal, 
sustained sounds; these
are less filtered! More about thi slater ...)
On the LM, they were just going cheap, if you ask me.

JH.


----- Original Message ----- 
From: "harry bissell" <harrybissell at copper.net>
To: "JH." <jhaible at debitel.net>
Cc: "diy" <synth-diy at dropmix.xs4all.nl>; "analog heaven" 
<analogue at hyperreal.org>
Sent: Wednesday, December 20, 2006 3:23 AM
Subject: Re: [sdiy] Farfisa VIP 500 modifications


Looks mighty fine...

just to keep a little conversation going...

The mods you did are not very expensive from a manufacturing point of
view...

Do you think the decision to use the square wave ~only~ in the original
reflected
a cost target they needed to meet, or a difference in what people at
that time
expected of an organ voice.  ie. Is the mod just more pleasing to our
ears, today ???

(certainly they knew how to make the sawtooth then...)

H^) harry  (who is not sure what his opinion is on this question...)

JH. wrote:
> The Lower Manual finally transformed into something useful.
>
> http://jhaible.heim.at/farfisa/jh_farfisa.html
>
> (scroll down - the new stuff is at the end.)
>
> JH.
>
>
>