[sdiy] super simple portamento / slide / glide / slew limiting circuit?

[Kyle Stephens]

http://www.elby-designs.com/asm-2/glide/glide-asm2-about.htm

Switchable lin and log response. One dual op amp, two resistors, cap, pot, switch.

HTH


_Kyle

--- On Wed, 7/13/11, Todd Sines <sines_list at scale.gs> wrote:

> From: Todd Sines <sines_list at scale.gs>
> Subject: Re: [sdiy] super simple portamento / slide / glide / slew limiting circuit?
> To: "Scott Nordlund" <gsn10 at hotmail.com>
> Cc: synth-diy at dropmix.xs4all.nl
> Date: Wednesday, July 13, 2011, 9:30 AM
> okay.. got one of them? 
> 
> [a schematic of something would be nice, all the "simple
> circuits" I've seen are just descriptions.]
> 
> 
> +odd
> --
> On Jul 13, 2011, at 12:28 PM, Scott Nordlund wrote:
> 
> > 
> >> Trying to mod my Roland CMU-810 synth expander
> module for portamento / slide / glide / slew limiting over
> the CV input.
> >> [and maybe audio in]
> >> 
> >> Anyone done this, or can suggest a proper
> portamento circuit that could be used to add to the input
> ..
> >> 
> >> The electro-music post suggests it'd be as simple
> as 3 components: a pot, a cap, and an op-amp... 
> >> http://electro-music.com/forum/post-149264.html
> > An RC circuit will give you an exponential portamento
> (constant time). It's possibly more of a "classic" sound,
> but it might be a little wonky sounding for longer
> portamento times, since it slows down and asymptotically
> approaches the destination pitch. A proper slew limiter
> (constant rate) might be better for general purpose use.
>    
>         
>           
>   
> 
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