[sdiy] Generating a large number of CV outputs

[Ingo Debus]

> Am 08.12.2023 um 01:35 schrieb Danjel van Tijn / intellijel <danjel at intellijel.com>:
> 
> Let's say I wanted to generate 100 outputs with an update rate of a few kHz and an equivalent bit depth of 12 or 16 bits.
> 
> I know that back in the day when DACs were extremely expensive, the designs would use a single DAC and then demux to a bunch of S&Hs.  
> 
> Now that DACs are cheaper, is it better to chain a bunch of 8- or 16-channel DACs? 

One thing to consider is, are all the CVs needed in one place/on one PCB, or do you need them scattered across a larger device (say, a modular synth)? In the latter case you could place the DACs where the CVs are needed and feed them with a common I2C or whatever bus. Much less wiring effort required, this could probably outweigh the lower cost of a DAC+S&H solution.

I’m curious, which CV needs 12 or even 16 bits of resolution with an update rate of a few kHz at the same time?

Ingo


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