opamp vactrol sustain?

[hyfee]

im trying to go about making a simple sustain type effect using opamps for the gain stage. i have a bunch of vtl5c2's. i've tried a few setups without any success. im thinking maybe use a 2 transistor setup to control the led like at the end of the colorsound suppasustain or roland sustain. as far as how to integrate this with an opamp gain stage im at a loss. any ideas?

[The Tone God]

I remember DOD's old compressor 280 was optocoupler based. Give that look up.

Andrew

[hyfee]

thnx, thats a good place to start

[toneman]

The Anderton compressor is a classic.

here it is---

http://www.fortunecity.com/tinpan/humperdinck/223/comp.gif

note:  copy, then paste in new window.....



edit:   this --   http://hem.passagen.se/robin2/effects.htm     Robin's site links to Stelan's link above.

scroll down to link to Stellan's site.....

I googled   "craig anderton"  compressor....
this-->   Robin Tomtlund-The Electronic Pages   was FIRST link....
google is your friend....



                         

[hyfee]

found this http://www.blackboxmusicfx.com/LDRAudioAppNotes.pdf which i found to be very helpful. anyone interested in using vactrols should check it out.