I wrote a little tool to show what "board.*" defines for a #CircuitPython build. I got tired for always trawling through ports/*/boards for it. It's called "cirpy-showpins" and its output looks like the below. I used #Perl originally but here's it in Python: https://gist.github.com/todbot/e91853b9d5e021405bb9a85081a39163

I've made *many* little SynthDIY boards over the years, targeting: low-cost, for newbies, Pico & CircuitPython. Here are some.
I've never been quite satisfied w/ the results.
Maybe the solution is more knobs & more choc keyswitches?
Good idea?
#SynthDIY #RaspberryPiPico #CircuitPython

Finished building my new hardwired split mechanical keyboard this weekend! #3dprinted based on my own design, spray painted and powered by a pair of Raspberry Pi Pico W’s. Of course, it’s running my fave #keyboard firmware #KMK! Sadly #CircuitPython doesn’t yet support BLE on the PicoW so it’s not wireless yet, but I’m just counting down the days!

(more details in the image alt text!)

Perhaps motivated by recent vision loss I've put together a tutorial showing how to add a round 1.28" GC9A01A TFT display to a @raspberrypi and animate a wiggly eye using #CircuitPython. Thanks to @Todbot for initial code & ideas. https://youtu.be/BBng36VB1S8

MIDI Controlled Pocket Operator?

https://makertube.net/w/2Ld3u3LDJnQPeLgyE2yPU9

MIDI violin using a USB mouse made with CircuitPython. Mouse movement controls the volume, while capacitive touch buttons determine which note plays.

https://youtu.be/fuEBxg8Sdrc

For the last month or so I've been working on seeing how far I can push CircuitPython into emulating a TB-303 bass synth. With the new audiofilters library, you can "stack" filters to make two two-pole filters seem like a 4-pole filter, getting close to that squelchy sound we need. My efforts so far:
https://www.youtube.com/watch?v=1AflpXbEIno
#circuitpython #tb303 #synthdiy #raspberrypipico

i built a new musical robot- this time for a smol toy piano xylophone: https://learn.adafruit.com/solderless-robot-toy-xylophone

coded in #CircuitPython and it doesn't require any soldering. it also has two modes: live #MIDI or music box. Live MIDI listens to incoming MIDI messages over USB, while music box mode plays back MIDI files (.mid) saved on the CIRCUITPY drive.

I should be socializing with our host here in Aarhus but instead I've been doing some #circuitpython crimes. What if we could run synthio on desktop computers? It… sorta works? but only if you live code your synthio at the repl. and pitches seem wrong. and it clicks when changing notes.

https://github.com/adafruit/circuitpython/compare/main...jepler:circuitpython:unix-sound-sdl

aud.py: https://gist.github.com/jepler/6785f1d44f481573a04335faaf814f03

$ cd ports/unix
$ make VARIANT=sound
$ ./build-sound/micropython
>>> import aud
>>> i = 72
>>> aud.s.release_all_then_press(i := i + 1)
>>> aud.s.release_all_then_press(i := i + 1)
>>> aud.s.release_all_then_press(i := i + 1)
>>> aud.s.release_all_then_press(i := i + 1)
>>> aud.s.release_all_then_press(i := i + 1)
>>> aud.s.release_all_then_press(i := i + 1)
>>> aud.s.release_all_then_press(i := i + 1)
>>> aud.s.release_all_then_press(i := i + 1)

New episode of The CircuitPython Show and the final episode of season 5! Meet Justin Myers, who wrote the connectionmanager library in #CircuitPython, making networking easier. https://www.circuitpythonshow.com/@circuitpythonshow/episodes/justin-myers

My Raspberry Pi Pico 2-based Dub siren now has a simple synth engine in addition to a sample engine, so its sounds now range from classic siren sounds to air horns and vocal snippets.

In this short video I show off the synth engine:

https://v.basspistol.org/w/qmjJ3TY8Q8mEzigVywDXmt

thx again 2 @todbot

And if you haven't seen it yet check out this video for yesterday's exploration of the sample engine:

https://v.basspistol.org/w/pS4PrN9Wjo5eFP4hqFSpYr

I was inspired by @todbot's latest #CircuitPython audio effects experiments, so I had a go at incorporating what I learned into a DIY Dub siren. It consists of a Raspberry Pi Pico 2, an i2s module with stereo line out and some pots, an encoder and a button.

Check out my unfinished (but already fun) prototype here:

https://v.basspistol.org/w/pS4PrN9Wjo5eFP4hqFSpYr

NB: the case was a charity shop find.

The new audio effects libraries in CircuitPython are super fun. Here's a quick "taster" showing off some of them, part of my impending "Synthio Tutorial". Thanks Mark & Cooper for making them!
https://www.youtube.com/watch?v=nyv7XlQ1d00
#CircuitPython #synthio #audioeffects #synthdiy

A #circuitpython asteroid tracker, although honestly not even in my top 10 existential threats right now

Work in progress of a Reverb sound effect for CircuitPython. Based on FreeVerb. #CircuitPython #Reverb

Catch up on the latest episode of The CircuitPython Show with #CircuitPython core developer Dan Halbert. We discuss building CircuitPython from source and Dan shares some tips and tricks to building it yourself:

I've hacked together a CircuitPython library to UART boot the RP2350. The two bin files it's uploading just cycle through the LEDs in different directions.

I still have no RUN pin so I'm using one of my USB Power Switches to power cycle the board.

Hmm, should I continue developing this? 8 x {pot, switch, LED} driveable by a QTPy or breadboard-able #CircuitPython #synthdiy #sequencer

Coming soon hopefully "picotouch_pad". Battery powered! MIDI out! Cool backlit RGB LEDs! A quick demo
https://www.youtube.com/watch?v=InseaCCDRAE&feature=youtu.be
#CircuitPython #synthDIY #RaspberryPiPico