[sdiy] Lego synth anyone?

[mark verbos]

In his BBD based delay module, Thomas Henry parallels some inverters for 
increased drive. What are you trying to achive.

In the high end DBX/THAT VCA's they had as many as 8 VCA's in parallel. 
They do this because the signal level goes up much faster than the 
noise, so with every additional VCA the noise gets lower. I don't 
remember the formula, their single VCA's are quiet enough for me.

Mark



anthony wrote:

> Lego synth made me think of something I saw in an audio DIY forum. 
> This particular group was all about making their own DACs for their CD 
> players. (I found some nice AD DAC's and wanted to see about doing 
> just that too...) Anyway apparantly someone had tried stacking up a 
> few DAC's - yeah stacking 'em up and soldering each pin in parallel. I 
> think it was a TDA1311 or something else Philips. I guess two and 
> three high had been done, but without any decent results. But EIGHT 
> high was the magic number! It looked like a famous piece of Italian 
> architecture. I think I remember that it ran kind of hot too. I can't 
> imagine how doing that would enhance the quality of the sound, but it 
> made me wonder what would happen if one were to stack, say, 8 4046's. 
> They're cheap right? Also you could use a 4069 as one big fat 
> inverter. I do suppose power handling capability would be improved - 
> maybe. Anyone ever tried such kookiness?
>
> ;
>
>