[sdiy] keyboard cv project

[Tim Ressel]

Caleb,

It is common to hold the CV of the last note. That way
the envelope can finish when the key goes up. This is
done with a sample-and-hold circuit (analog) or a
microprocessor (digital). Barry Klein's book has
schematics in it for this.

--Tim


--- Caleb Johnston <caleb_1 at msn.com> wrote:
> Hi, everyone.
> 
> I am attempting to construction a simple cv
> keyboard.  It will simply have 
> one out that will send voltages to whatever.
> 
> My plan was to have resistors in series that would
> devide up the voltage.  
> Each key would then correspond to the correct amount
> of resistors/voltage.
> 
> This works fine except when no key is being held ,
> there is no cv output.  I 
> have noticed that my store bought synth's cv always
> outputs the last 
> note/voltage played, even when no keys are pressed.
> 
> What is standard?  To have the last note played sent
> out until changed?  
> Would this be easy to do schematically?  How?
> 
> Thanks for your help.
> 
> -Caleb
> 
> 
> 
> 
> 
>
_________________________________________________________________
> Add photos to your messages with MSN 8. Get 2 months
> FREE*.  
> http://join.msn.com/?page=features/featuredemail
> 


__________________________________________________
Do you Yahoo!?
Yahoo! Tax Center - forms, calculators, tips, more
http://taxes.yahoo.com/