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Hi,
I am interested in the filter sweep section of Electro Harmonix Micro Synth.

Could you suggest me some layouts, strip boards or clones project??...

I found this : http://experimentalistsanonymous.com/di ... 20Shapers/

I' am reffering to 11ht schematic down the list. I am just interested in attack/sustein control, something like Boss sg1... And the filter section, expecially the resonance enancer.... And I have CA3094...

Any suggestions or other projects??

Thank you in advance for your replies.

Hi
honestly the EHX microsynth enveloppe is pretty basic, simple AR + Delay...
I'd suggest to build a better enveloppe follower + a good ADSR enveloppe; then as filter I find the Steiner VCF much more musical and crazy than any OTA-based VCF but there are tons of VCFs which are very good too.

Fast and accurate enveloppe follower:
http://m.eet.com/media/1141271/18042-122602di.pdf
Then add a gate out:


A good and easy to build ADSR, for example:
http://yusynth.net/Modular/EN/ADSR/index_new.html

And a nice VCF:
http://yusynth.net/Modular/EN/STEINERVCF/index-v2.html

You have plenty of choice concerning the VCF and ADSR, but not too much concerning the enveloppe follower. There are many threads about the Bissel circuits and most people seem to agree that it is one of the best enveloppe follower design out there.
If you go this way you will achieve easily a small modular guitar mono synth, much much better than the EHX pedal.

(no edit button?)
Also there is a nice project (have fun with the pcb ):
http://www.wiseguysynth.com/larry/guitar.htm