[sdiy] VC and CV keys

[Ray Wilson]

Hi Pat

Here are some keyboard ideas. You may glean some things from these pages.

http://www.musicfromouterspace.com/analogsynth/matrix_keyboard_may2004/matrix_keyboard_may2004.html

http://www.musicfromouterspace.com/analogsynth/keybrdcontroller.html

Cheers and good building.

Ray


----- Original Message ----- 
From: "Pat Kammerer" <spivkurl at wearerecords.com>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Saturday, June 05, 2004 6:39 AM
Subject: [sdiy] VC and CV keys


> Hi all,
>
> I've just got two questions, and you all seem to know what you're doing,
so
> I'm sure someone will be able to help.
>
> 1)  Is it true that to protect components in a circuit, the CV will need
to
> be below the supply voltage of the circuit?  Would this be best done by
> having the CV supply lower than the supply of any of your modules, are by
> limiting the input with zener?  Maybe I'm missing a method, any help
> appreciated.
>
> 2)  I am building a CV keyboard, and I know the basics of getting CV,
Gate,
> and trigger outputs of the switches.  My question is, does anyone have
> recommendations for the resistor chain?  What values have you used with
> success, and do you use trimmers?  In my protoboarding, I've been using 2M
> panel mount trim pots (intended for tube circuits), but these seem to not
> have the correct senesetivity or range for finetuning, while they are fine
> for just learning the basic circuit layout.
>
> Thanks in advance!
> Pat
>