Have you got the old book, Electronic Projects for Musicians by Craig Anderton? There's a Compressor, Phaser and Envelope Filter in there that uses opto isolators.
The book is quite old and I don't know if the newest edition is the same as the old one or not. I know it has been widely discussed on the diystomboxes forum and the schematics might be available there too.
Have you got the old book, Electronic Projects for Musicians by Craig Anderton? There's a Compressor, Phaser and Envelope Filter in there that uses opto isolators.
Hi Bossarea, Laurie & Guys
I have a copy of that in my library, Though I don't know if it was the older or newer reprint.
He had one on Home Recording as well, that I once saw at our local library.