[sdiy] Polyfusion CV specs & quantizers.

[anthony]

So I'm still in the middle of making my quantizer. It doesn't HAVE to be an 
accurate equal temperament quantizer I just need to get it close, but 
hopefully accurate enough for some melodic passages every now and then. It's 
going to be used mostly with a sample&hold though so it doesn't have to be 
all that.

Anyway I think if I just had a specific desighn that someone else had made 
and stuck to THAT I'd be in good shape, but NO. You guys know me and if I 
have to buy something well it just isn't going to be done. Undaunted I try 
to imporovise as best I can.

At the moment I am looking at Scott Stit'es great qwuantizer usign a DAC 
staircase and I like it, but I'm following more closely the Polyfusion 
design because I got a great idea for an R2R ladder staircase like they use, 
but using a CD4518 and a 74C42 instead of a CD4024. The more I think of it 
the more I like how practical and robust this idea is. Just look at the 
pinout of the 74C42: All of the resistors are right next to each other in 
the right order! Woohoo! And I think the output drive is better than a 4024.

The problem is the more I look at it the more I like all the other things 
that the Polyfusion quantizer design is doing: external gate, panel variable 
quanta interval etc.

But I can't seem to get specs for the Polyfusions CV range. It looks liek a 
5V system and I wanted to use it with Buchla type modules and such. Do I 
just change the voltages at the reference supply?

I hope someone here has lots of good experience with Polyfusion gear. I also 
hope that I can fit all of those parts for the Polyfusion Quantizer on the 
big-but-not-that-big fiberglass protoboard that I am using. I guess it's 
also good thing that I actually HAVE all of the parts.

Eventually I want to make a quantizer exactly the way Scott Stites did. 
Probably also Ken Stone's Diatonic converter which looks very interesting as 
well.


aa