[sdiy] Best AVAILABLE OTA for building new designs?

Gordonjcp gordonjcp at gjcp.net
Tue Aug 13 08:47:30 CEST 2024


On Tue, Aug 13, 2024 at 07:54:24AM +1000, Adam (synthDIY) wrote:
> 
> 
> > On 12 Aug 2024, at 11:38 PM, Mike Bryant <mbryant at futurehorizons.com> wrote:
> > 
> > I think you need to watch some videos of the late Keith Emerson.  He'd happily have twenty or more keys pressed on a Hammond, some of course held down with knives :-)
> 
> David, you might be able to use this as a "feature"...  have a front panel control labelled "Knife Factor" that switches in a compressor with auto-make-up gain... 

Given that compressors work by controlling their gain based on output level - a negative feedback loop - I have this feeling that you could probably sum all the VCA CVs to give a "total output demand" voltage, which could be fed back to the DAC Vref (taking us back around to the multiplying DAC question) to depress the output voltage and keep the total level approximately constant.

"Approximately" because you'd want it to have a bit of dynamics, you wouldn't want one note to be as loud as ten, but maybe five should be as loud as ten.

-- 
Gordonjcp



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