[sdiy] Quantizer DAC or PWM?

Mike Bryant mbryant at futurehorizons.com
Mon Dec 19 17:31:33 CET 2022

PDM is better than PWM, but I don't think the ESP-32 has an easy way of swapping the bits round on the comparator, so really depends what quality level you want.

From: Synth-diy <synth-diy-bounces at synth-diy.org> on behalf of Didier Leplae via Synth-diy <synth-diy at synth-diy.org>
Sent: 19 December 2022 16:10
To: synth-diy mailing list <synth-diy at synth-diy.org>
Subject: [sdiy] Quantizer DAC or PWM?

I’m working on developing a quantizer module for eurorack. I made a previous version using a PIC chip with a DAC which I abandoned during the chip shortage.
Now I’m looking at taking up the project again but possibly with an esp32-s3 chip instead. This chip only has PWM, though.

Question is whether PWM with smoothing circuit is it accurate enough for a quantizer? Does anyone have smoothing circuit to recommend?
Or is a DAC the better option?

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