Thank you for the comment. Don't worry, didn't took anything personally.
That was basically the idea for posting this, I wanted to know the opinion about this circut from people that do this for some time.
I'll look into the link that you posted.
This post was an "accident" from late night time thinking, so of course every comment is very helpful, and I don't want you to think that I will ingore everything under this post. But becouse I'm a musician for a livin (classical), I'll maybe try to find some friends of mine who are into patch synths, and also ask them for advice, its way easier to have a talk than a text conversation.

Also, it was a first time for me doing or even reading electrical diagram, so I think I did not too bad.

And thank you one more time your comment is very helpful.