Stu-
I know this may be out of your price range - and may not fit your
design criteria - but for ease of assembly have you thought of the
Doepfer CTM64 or MKE combined with a MCV4 or A-190. The limitations
are no portamento and you will be defaulting to tempered scales but
you could have LOTS of switches/buttons plus the added modulation and
pitch bend inputs.

-James

On Feb 3, 2008, at 3:49 AM, Stu Grimshaw wrote:

> hi group, especially florian,
>
> i'm thinking about building a simple keyboard replacement - different
> arrangement of the keys but still the tempered scale. i think i know
> how i want to do it, but i'd appreciate any advice that anybody may
> have.
>
> first question to florian (or anybody that has his book griffbereit):
> on page 32 of your book "synthesizer" you have a simple diagram of a
> control voltage generator, each resistance corresponding to one key on
> the keyboard. what would you recommend as a suitable value for the
> resistors and should i be using 5v as shown in the previous diagram,
> or 12v as stated in the text
>
> secondly, i intend to produce the gate by simply putting the control
> voltage through a comparator - everything above 0v opens the gate.
> does anyone foresee any problems here
>
> and any other problems i've overlooked
>
> all comments much appreciated,
>
> stu
>
>
>
>
> Yahoo! Groups Links
>
>
>