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diyelectromusicI finally have a good enough Eurorack version of my picoDexed.<a href="https://diyelectromusic.com/2025/05/03/picodexed-minidexed-eurorack/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://diyelectromusic.com/2025/05/03/picodexed-minidexed-eurorack/</a>This is using a neat pico-to-zero adaptor from bablokb, released on Github, which allows me to use my existing MiniDexed PCBs and module with no other hardware changes.<a href="https://mastodon.social/tags/picoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#picoDexed</a> <a href="https://mastodon.social/tags/RaspberryPiPico" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RaspberryPiPico</a> <a href="https://mastodon.social/tags/EuroRack" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#EuroRack</a> <a href="https://mastodon.social/tags/SynthDIY" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SynthDIY</a>

diyelectromusic<a href="https://mastodon.social/@rpimag" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@rpimag</a> I went back to my picoDexed (Synth_Dexed on a Pico) and updated it for the latest Pico SDK and added a simple display and encoder.<a href="https://diyelectromusic.com/2025/04/12/raspberry-pi-pico-synth_dexed-revisited/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://diyelectromusic.com/2025/04/12/raspberry-pi-pico-synth_dexed-revisited/</a>I've not quite got to the stage shown in the photo - the sound isn't working on this one yet - but it's getting close (it worked fine on my breadboard version)!And yes, this is one of my MiniDexed front panels...<a href="https://mastodon.social/tags/WorkInProgress" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#WorkInProgress</a> <a href="https://mastodon.social/tags/MakerMonday" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MakerMonday</a> <a href="https://mastodon.social/tags/picoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#picoDexed</a>

diyelectromusicI thought this would be an easy fix - using a Pi Zero-format RP2040 board in my MiniDexed EuroRack module...... but it ended up an afternoon of frustration and unfortunately I still can't get it making sound or booting reliably.It does look cool though :)Anyone else have any experience of these Stacky-Pi "RP2040 on a Pi Zero shaped PCB" boards?<a href="https://diyelectromusic.com/2025/04/12/picodexed-stackypi-minidexed-eurorack/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://diyelectromusic.com/2025/04/12/picodexed-stackypi-minidexed-eurorack/</a><a href="https://mastodon.social/tags/PicoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PicoDexed</a> <a href="https://mastodon.social/tags/MIDI" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MIDI</a> <a href="https://mastodon.social/tags/StackyPi" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#StackyPi</a> <a href="https://mastodon.social/tags/MakerFail" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MakerFail</a>

diyelectromusicI've updated my <a href="https://mastodon.social/tags/picoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#picoDexed</a> to include a basic encoder/display UI and updated to the latest Pico SDK.This is a port of Synth_Dexed to the Raspberry Pi PIco.I also thought it was probably about time I actually documented the basic architecture :)<a href="https://diyelectromusic.com/2025/04/12/raspberry-pi-pico-synth_dexed-revisited/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://diyelectromusic.com/2025/04/12/raspberry-pi-pico-synth_dexed-revisited/</a><a href="https://mastodon.social/tags/MIDI" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MIDI</a> <a href="https://mastodon.social/tags/SynthDIY" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SynthDIY</a> <a href="https://mastodon.social/tags/DX7" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DX7</a> <a href="https://mastodon.social/tags/Synth_Dexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Synth_Dexed</a>

diyelectromusicMy picoDexed now has very rudimentary ssd1306 OLED display support.All it shows is voice name at the moment.<a href="https://mastodon.social/tags/picodexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#picodexed</a>

diyelectromusic<a href="https://cupoftea.social/@MakersHour" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@MakersHour@cupoftea.social</a> <a href="https://a.gup.pe/u/makershour" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@makershour@a.gup.pe</a> Oh, I forgot it was <a href="https://mastodon.social/tags/MakersHour" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MakersHour</a> Oh well. I'll perhaps sit and wander through the responses in the morning :)(I was buried in the code for my <a href="https://mastodon.social/tags/picoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#picoDexed</a> after not really touching it for a year)

diyelectromusic<a href="https://mastodon.social/@todbot" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@todbot</a> With DSP and floating point, my <a href="https://mastodon.social/tags/PicoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PicoDexed</a> suddenly feels a lot more plausible!! :)

diyelectromusicFor what it's worth, I've now added a PWM output option too, but I have to say, I can't recommend it! A cheap I2S DAC is so much better :)<a href="https://diyelectromusic.wordpress.com/2024/02/19/raspberry-pi-pico-synth_dexed-part-6/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://diyelectromusic.wordpress.com/2024/02/19/raspberry-pi-pico-synth_dexed-part-6/</a><a href="https://mastodon.social/tags/PicoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PicoDexed</a> <a href="https://mastodon.social/tags/SynthDIY" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SynthDIY</a> <a href="https://mastodon.social/tags/RaspberryPiPico" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RaspberryPiPico</a>

diyelectromusicPaging <a href="https://fosstodon.org/@gadgetoid" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@gadgetoid</a> - do you know if Pimoroni have a Fedi presence? I've not found one..But thought you might like to see this fun use of the Audio Pack for the Pico... :)<a href="https://diyelectromusic.wordpress.com/2024/02/18/raspberry-pi-pico-synth_dexed-part-5/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://diyelectromusic.wordpress.com/2024/02/18/raspberry-pi-pico-synth_dexed-part-5/</a><a href="https://mastodon.social/tags/PicoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PicoDexed</a>

diyelectromusicI've added some notes on how to collect together the hardware required for a prototype PicoDexed, including how to use a cheap PCM5102 DAC with it.I've also now uploaded a prototype UF2 file that can be used directly.If you have a Pico and a DAC - feel free to give it a go! :)<a href="https://diyelectromusic.wordpress.com/2024/02/18/raspberry-pi-pico-synth_dexed-part-5/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://diyelectromusic.wordpress.com/2024/02/18/raspberry-pi-pico-synth_dexed-part-5/</a><a href="https://mastodon.social/tags/PicoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PicoDexed</a> <a href="https://mastodon.social/tags/RaspberryPiPico" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RaspberryPiPico</a> <a href="https://mastodon.social/tags/SynthDiy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SynthDiy</a> <a href="https://raspberrypi.social/@Raspberry_Pi" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@Raspberry_Pi</a>

diyelectromusicAnd I've now made some more notes on my blog.I wasn't going to bother but seeing as I've had to work through its MIDI support, SysEx parsing and now the difference between the USB packet and stream modes of TinyUSB, I thought I perhaps ought to make a few notes before I forget it all!<a href="https://diyelectromusic.wordpress.com/2024/02/16/raspberry-pi-pico-synth_dexed-part-4/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://diyelectromusic.wordpress.com/2024/02/16/raspberry-pi-pico-synth_dexed-part-4/</a>This is probably going to be my last blog post on this topic for a while now though. Although I'll keep tinkering with the code :)<a href="https://mastodon.social/tags/PicoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PicoDexed</a> <a href="https://mastodon.social/tags/MIDI" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MIDI</a> <a href="https://mastodon.social/tags/RaspberryPiPico" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RaspberryPiPico</a> <a href="https://mastodon.social/tags/TinyUSB" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#TinyUSB</a>

diyelectromusicI appear to have rudimentary USB MIDI Device support now on my PicoDexed :)<a href="https://github.com/diyelectromusic/picodexed" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://github.com/diyelectromusic/picodexed</a>(I added SysEx the other day too, which I think is largely working...)<a href="https://mastodon.social/tags/RaspberryPiPico" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RaspberryPiPico</a> <a href="https://mastodon.social/tags/SynthDiy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SynthDiy</a> <a href="https://mastodon.social/tags/Dexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Dexed</a> <a href="https://mastodon.social/tags/DX7" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DX7</a> <a href="https://mastodon.social/tags/PicoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PicoDexed</a>

diyelectromusicOk, so I can now change voices (8 banks of original DX7 ROMs loaded), use controllers, and pitch bend on my <a href="https://mastodon.social/tags/PicoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PicoDexed</a> I need to decide how best to control it. I didn't really want a built-in user interface like MiniDexed, but instead was thinking of something else poking it over MIDI.Doesn't mean I can't do another Pico with a MiniDexed-like UI of course - I just don't want it all tied to the main synth engine.<a href="https://github.com/diyelectromusic/picodexed" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://github.com/diyelectromusic/picodexed</a><a href="https://mastodon.social/tags/PicoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PicoDexed</a> <a href="https://mastodon.social/tags/SynthDiy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SynthDiy</a> <a href="https://mastodon.social/tags/RaspberryPiPico" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RaspberryPiPico</a>

diyelectromusic<a href="https://strangeobject.space/@Maker_of_Things" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@Maker_of_Things</a> <a href="https://a.gup.pe/u/makershour" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@makershour</a> A1 Hello <a href="https://mastodon.social/tags/MakersHour" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MakersHour</a>, Kevin here. This week I'm feeling pretty pleased with myself as I've now got a usable PicoDexed synth (for some varying value of "usable"). I'm now adding in some of the glue needed to change voices and things like that.<a href="https://diyelectromusic.wordpress.com/2024/02/04/raspberry-pi-pico-synth_dexed-part-3/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://diyelectromusic.wordpress.com/2024/02/04/raspberry-pi-pico-synth_dexed-part-3/</a><a href="https://mastodon.social/tags/MakersHour" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MakersHour</a> <a href="https://mastodon.social/tags/RaspberryPiPico" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RaspberryPiPico</a> <a href="https://mastodon.social/tags/PicoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PicoDexed</a> <a href="https://mastodon.social/tags/Synthdiy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Synthdiy</a>

diyelectromusicIt works! 16 note polyphony at a sample rate of 24000 (or 8 note at 48000) when running at 250MHz :)And still a bit of processing power spare :)<a href="https://mastodon.social/tags/PicoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PicoDexed</a> <a href="https://mastodon.social/tags/RaspberryPiPico" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RaspberryPiPico</a>

diyelectromusic<a href="https://mastodon.social/@themagpi" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@themagpi</a> My PicoDexed is now playable over MIDI.It's still only a single voice, and only on channel 1 with a 24000 sample rate, but it is now just about stretched out to 10 note polyphony...<a href="https://makertube.net/w/1UFqJqAiupNYSm2NQJaUZN" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://makertube.net/w/1UFqJqAiupNYSm2NQJaUZN</a>The current state of progress is written up here: <a href="https://diyelectromusic.wordpress.com/2024/02/04/raspberry-pi-pico-synth_dexed-part-3/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://diyelectromusic.wordpress.com/2024/02/04/raspberry-pi-pico-synth_dexed-part-3/</a><a href="https://mastodon.social/tags/PicoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PicoDexed</a> <a href="https://mastodon.social/tags/RaspberryPiPico" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RaspberryPiPico</a> <a href="https://mastodon.social/tags/MIDI" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MIDI</a> <a href="https://mastodon.social/tags/MagPiMonday" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MagPiMonday</a>

diyelectromusicPart 3 of my experiments with Synth_Dexed on a Raspberry Pi Pico is now up.TL;DR: It plays over MIDI! I have 10 note polyphony, albeit with a single voice, only on channel 1, and at the somewhat Lo-Fi sample rate of 24000.But it works!<a href="https://diyelectromusic.wordpress.com/2024/02/04/raspberry-pi-pico-synth_dexed-part-3/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://diyelectromusic.wordpress.com/2024/02/04/raspberry-pi-pico-synth_dexed-part-3/</a><a href="https://mastodon.social/tags/MIDI" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MIDI</a> <a href="https://mastodon.social/tags/PicoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PicoDexed</a> <a href="https://mastodon.social/tags/RaspberryPiPico" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RaspberryPiPico</a> <a href="https://mastodon.social/tags/Synthdiy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Synthdiy</a>

diyelectromusicI've just put up the second part of my messing around with <a href="https://mastodon.social/tags/PicoDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PicoDexed</a> - a build of Synth_Dexed for the Raspberry Pi Pico.Summary: It is still only good for 5-note polyphony, but I'm starting to understand why and what I'd have to do about it. I'm still deciding if I want to...All the gory details can be read here, along with my analysis of how the pico_audio library works.<a href="https://diyelectromusic.wordpress.com/2024/01/21/raspberry-pi-pico-synth_dexed-part-2/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://diyelectromusic.wordpress.com/2024/01/21/raspberry-pi-pico-synth_dexed-part-2/</a><a href="https://mastodon.social/tags/SynthDexed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SynthDexed</a> <a href="https://mastodon.social/tags/RaspberryPiPico" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RaspberryPiPico</a> <a href="https://mastodon.social/tags/DX7" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DX7</a>

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