[sdiy] New site for og2 DIY synth project

[Scott Bernardi]

There was a discussion on the list about how Keith Emerson did the intro to
"Hootenanny", and it was decided he had a glide/portamento with different
rise and fall time constants. In thinking about how to do it, I knew that
diodes would enable paths through different pots to have independently
adjustable time constants on the rise and fall. Then it was just a matter of
compensating for the diode drop by putting the whole thing in the feedback
loop of another opamp.

haima wrote:

> thanks for putting this site up scott - you've done a nice job with
> all the pics/schems/pcbs etc... looking forward to trying some of the
> (non ssm/cem) designs... :)
>
> btw, where did you get the design or idea for your lag processor?
>
> speaking of lag processors - has anyone seen a schematic of the emu
> modular lag processor design? i remember someone posted a message
> saying they had one and was were thinking about tracing it... anyone
> have anything on this design?
>
> thanks!
> haima
>
> >Well, I finally put up the new site for my og2 Synth project - I've only
> >been working on it for almost two years now (the synth, not the
> >website).
> >I've got the majority of my modules built and working, but I still don't
> >have an instrument to play yet! og2 will be a semi-modular with
> >overidable patches, and I've got a bunch of working PCB's, but haven't
> >built the front panel and case yet.
> >There are a lot of schematics presented. Some using CEM and SSM chips I
> >cannibalized out of my original OGEE synth built back in the 80's, but
> >also a lot of "from scratch" modules too. There's also a nice list of US
> >sources for parts.
> >
> >Check it out at
> >http://members.home.net/sbernardi/elec/og2/og2_home.html
> >
> >
> >
> >--
> >Scott Bernardi
> >sbernardi at home.net

--
Scott Bernardi
sbernardi at home.net