Apresentando o VSG-01

Olá
O VSG-01 (Vintage Synthesizer for Guitar) é um sintetizador totalmente analógico para guitarra (e outros instrumentos musicais, e até vozes), que projetei e vou começar a construir. A exemplo do MiniBrasil, colocarei neste blog a evolução do VSG, à medida que for construindo seus circuitos.
Esta é uma ideia antiga, que remonta os idos da década de 1970, quando explodiram os sintetizadores analógicos, e o irmão do guitarrista dos Mutantes (Cláudio Cesar Dias Batista) publicou seu sintetizador para guitarras, baseado no Minimoog.
Sempre fui fascinado pela ideia de montar um sintetizador, como já mencionei aqui. Montei o MiniBrasil (na verdade estou quase no final), e agora me aventuro na construção de um sintetizador para guitarras (sem teclado).
De início, coloco o diagrama em blocos do VSG, para se ter uma ideia de sua configuração e possibilidades.

Abraços
Gustavo

Some notes for Eierreiter

Este post vai como resposta a um inscrito no meu canal do Youtube, pois não consegui responder diretamente a ele (por algum problema no Youtube).
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Hi Eierreiter
Thanks for you visit.
It's really good to know that we are not alone... I have been dreamming with Minimoog since my teenages...

About the case, I made it with normal wood, some pices of aluminium plate. For fixing the panel I used a so called hinge for piano.
My dificulty was the real dimensions of Minimoog case. As I was not able to get the official dimensions, I made some assumptions around the keyboard size and made my own case (with dimensions I defined). It was not exactly the same but it was very very close to that. I think it was nice.
Its explained on this blog (previous posts).
For the keyboard I got a Yamaha out of order and used the keyboard mechanism. So I decodified his keys and developed a microcontroler based circuit to decode the key AND generate de notes. For square waveform it was done; so I developed a waveshaper to get the triangle, saw, pulse and tri-saw waveforms. Sincerelly, it was nice... I will post more samples as soon as possible...
Well for left hand controller, I'm on the road yet. The mechanism is almost ready, as can be seen here. I used 1.5mm thin aluminium plate and a poor mechanism for pitch bend (it is not so good; I will improve that...). As I'm generating the waves digitally (with a microcontroller), I'm developing the algorithms for modulation. I supose I will be finished on February/March of 2011 (I hope...). If you want I can explain this with more details...
For the VCF I used the CA3046 that is an array of matched transistors incapsulated on a chip. Moreover, I selected the other transistors in the ladder, so my VCF worked nicely.
So, if you have any other note, I will be pleased to help.
And if I have some question, I will send it tou you.
Cheers
Gustavo