[sdiy] lots of VCAs on one PCB

[Andreas Wetterberg]

I would think that a THAT vca cluster would be the best way to go on this.
I think it's about time this gets some cool boards made for it - if you 
build the project in a way that can be used for other, perhaps more 
generic things, then I'd be very interested in the outcome.

Andreas
(who keeps meaning to start a THAT project... and who also has some 
joysticks ;) )
--

Derek Holzer skrev:
> Howdy all,
>
> I'm looking at building a joystick controlled 4x4 matrix mixer, which 
> requires 16 VCAs when it's all added up. It would be for control 
> voltage, so a linear VCA is required. I've looked at the Thomas Henry 
> VCA, which is pretty simple and quite nice, but all the layouts I've 
> found for it are fairly large.
>
> It struck me that a vocoder would need approximately the same amount 
> of VCAs (depending on the number of analysis/resynthesis channels of 
> course), so there must be some layout someplace that has a lot of VCAs 
> packed together on one PCB board.
>
> Can anyone point me to a layout that packs so much into a fairly small 
> space (one Eurocard sized PCB 100x120mm)? Or a super basic linear VCA 
> schemo that could be laid out in such a way? Alternately, is there 
> anyone interested in working with me to design such a thing? I'd be 
> willing to invest something in getting PCBs made in this case.
>
> Best!
> Derek
>