# Seeed RP2040 dual DCO

**URL:** <https://lookmumnocomputer.discourse.group/t/seeed-rp2040-dual-dco/5394>\
**Category:** DIY STUFF\
**Created:** [August 19, 2022, 5:19pm UTC](https://lookmumnocomputer.discourse.group/t/seeed-rp2040-dual-dco/5394 "2022-08-19T17:19:47Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![craigyb](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/craigyb/32/21602_2.png) [@craigyb](https://lookmumnocomputer.discourse.group/u/craigyb)\
**Post date:** [August 19, 2022, 5:19pm UTC](https://lookmumnocomputer.discourse.group/t/seeed-rp2040-dual-dco/5394/1 "2022-08-19T17:19:48Z")

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Carrying on the excellent work by Jan Knipper, I ported his Polykit Pico DCO to the Seeed XIAO RP2040, not much of a feat I know, but I made a single voice dual DCO with the available pins. I modded the detune so only the second DCO actually detuned down from the first. I also added the FM input and control input both +/-5v input range. Gate output 0-3.3v as before, could be level shifted if needed.

The stack has gone as it’s now a permanent 2 DCO voice. Each wave has its own VCA so it can be mixed by voltage control or a control knob. There is an octave select for -1/0/+1 octave adjustment. input is by Din MIDI or USBmidi as before. Really a Pico could have been used, but I bought half a dozen of these modules and wanted to try to use them.

> **[GitHub - craigyjp/Seeed-RP2040-dual-DCO: A single voice dual DCO with the...](https://github.com/craigyjp/Seeed-RP2040-dual-DCO)**
>
> A single voice dual DCO with the Seeed XIAO RP2040 - GitHub - craigyjp/Seeed-RP2040-dual-DCO: A single voice dual DCO with the Seeed XIAO RP2040

 ![20220819_200927](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/8/0/8023cb977c2d2fc02e2758a20c8fe327645caace.jpeg)  
 ![20220819_113759](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/e/a/ea36bf457e1869f3c9d44fd40b5346403a5ca0eb.jpeg)