# My build progress **URL:** \ **Category:** DIY STUFF\ **Created:** [March 1, 2020, 8:57pm UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345 "2020-03-01T20:57:53Z")\ **Posts on this page:** 1\ **Showing post:** 3171
**Author:** ![jkb](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/jkb/32/26136_2.png) [@jkb](https://lookmumnocomputer.discourse.group/u/jkb)\ **Post date:** [April 19, 2021, 6:17pm UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/3171 "2021-04-19T18:17:26Z")
![pico-dco](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/c/c6cee080fb85a97491892e2b371bbf88d613cea8.jpeg) I got the Pi Pico DCO working! It uses PIO to generate a highly accurate frequency. The “analog” oscillator part is based on the Juno 106 same as [Arduino Nano based DCO](https://lookmumnocomputer.discourse.group/t/arduino-nano-based-dco/2613). This time I ommited expensive external parts like ADC/DAC and use PWM smoothing for amplitude compensation. It is controlled by USB Midi, I think I will also add DIN Midi. It should be able to drive 8 separate oscillators because there are 8 distinct state machines that control GPIO pins. Currently gate output and some Midi programming is missing, maybe I will make it even polyphonic. --- _[View the full topic](https://lookmumnocomputer.discourse.group/t/my-build-progress/345)._