[sdiy] Quantizer project.. incoming CV's switching point to change to quantized output CV's ...

[Brian Willoughby]

It depends upon how many octaves of range you want the DAC to cover.

5 octaves (5 V) with 12 bits gives 1.46 cents per step ... if I did the math correctly.

There are some 14-bit DAC chips if you don't think you need 16-bit accuracy, but sometimes the price is less for 16-bit due to supply and demand.

Brian


On Jul 4, 2021, at 16:30, Mike Bryant <mbryant at futurehorizons.com> wrote:
> I'd personally recommend a DAC with more bits as this allows you to implement non-equal temperament scales more accurately.  For example in Pythagorean tuning do you accept 702 cents as being good enough for the 3:2 ratio, or do you want it dead on.  
> 
> -----Original Message-----
> From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of Jean-Pierre Desrochers
> Sent: 05 July 2021 00:19
> To: 'Brian Willoughby'
> Cc: 'SDIY'
> Subject: Re: [sdiy] Quantizer project.. incoming CV's switching point to change to quantized output CV's ...
> 
> I agree with you Brian.
> Yes, the use of dead zones are necessary around the threshold points to  avoid any glitches on quantized output..
> I think my PIC micro's  10bits A/D would be Ok to read the incoming CV signal.
> The quantized output though will be from an external SPI 12bits DAC.