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Thanks for your replies, mates!

My idea was rather an adaptation with PT2399 based chorus than a simple chip swapping 
In fact, 3 GLAM-ish effect circuits with a tri-LFO modulation or a 3 GLAM circuits with each LFO sync'ed and shifted from each other.
I found some schematics like this one:
http://www.schmitzbits.de/triphase.html
Sounds like a good starting place. 

Anyway, I'm going to ask for infos on D.I.Y Synth forums.
I'll post here again if my project is successful! 

Thanks again!

Hi everyone,

As said above, I'd like to build a triple chorus based on Brian's GLAM project.
Largely inspired by the "J.HAIBLE Chorus" (http://jhaible.com/legacy/triple_chorus/triple_chorus.html), I'd like to sync LFO's and shift their phase 120° from each other to obtain a fat and lush effect.
Of course, I'd like to keep a speed control on modulation.

I'm sure it's not so hard, but I can't figure how to do that...

OK, that's what I thought, but I wanted to be sure before I make any board: don't have any other way to verify it works... 

Thanks Juan! As you said, I'm sure these filters are great ! ;-)

Hi there!

I would like to modify a Sea Urchin delay to adapt the SZSDX "analog" and "tape" filter section on a self-etched board.
But there's something I don't understand: what is the "VR" supply point on the schematic? Power of the tl074 is supplied by the closest "+9v" point, right?

Thanks!

Hi,

I'm planning to build a Bloviator soon, and I'd like to mod it with ideas I found about Bajaman's Sonic Stump as Bloviator is based on this project.
All mods are shown within this topic on FSB:
http://www.freestompboxes.org/viewtopic.php?f=13&t=395&start=80
But I have a question about putting switches and caps for C4 and C5:
How can I determine values of those switched caps if want to control specific frequencies.
For example: I think i'll use it with a bass guitar (with input cap "bass mod") and I'd like to tweak on 110hz, 220hz, or such frequencies with "Contour" pot. How can I find the correct cap value?
2nd thing: I'd like to make the same thing with the "Mid Pot mod" (replacing R16 with a 10k resistor + a 50k pot). Which cap have I to replace with a switch + caps?

Many thanks!