[sdiy] VCA - linear vs. expo control, digital modulation source

[Chris McDowell]

Howdy Steve, 

I think 12 bits is plenty for envelopes. In my experience, an ADSR out of a 12bit DAC has been sufficient for every case I've tried (VCF, VCA, VCO) 

"Too chunky" of course is subjective, and you might be able to notice issues if you look really hard.

I'm not seeing a reference to this now, so maybe I made it up, but I seem to recall the Juno 106's envelopes being 10 bit. ¯\_(ツ)_/¯  

Cheers, 
Chris 

> On Aug 4, 2016, at 8:15 AM, sleepy_dog at gmx.de wrote:
> 
> Hey there SDIYers!
> 
> If I want to control a VCA of a synth voice, like typically after the VCF, and the source of the control signal is an MCU with a 12-bit DAC.
> Is the 12-bit resolution enough to control a VCA with linear control circuit even if I'd like to use (perhaps switchable) exponential curves generated in software, or might this be too chunky in some regions and I'd be significantly better off using a VCA with exponential response?
> 
> Thanks in advance,
> Steve
> 
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