EuroPi
ctag-tbd
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EuroPi | ctag-tbd | |
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34 | 2 | |
390 | 137 | |
4.6% | - | |
8.6 | 0.0 | |
17 days ago | 18 days ago | |
Python | C++ | |
Creative Commons Zero v1.0 Universal | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
EuroPi
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Using a Raspberry Pi Pico as a cheap multi-channel DAC for pitch CV
Hi all, I'm making a Eurorack sequencer module with 4 pitch CV outputs (NOT audio) and I've noticed that DACs are kind of a pain due to being expensive, SMT-only & still requiring buffering with op amps. I figure that a good alternative would be to buy a Raspberry Pi Pico for $4 which will give me 8 PWM outputs that I would then hook up to an output stage like the one in the europi (shown here: https://github.com/Allen-Synthesis/EuroPi/blob/main/hardware/EuroPi/schematic/europi_schematic.pdf)
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What is your favorite open source eurorack module? And the best documented?
Bom has links for sourcing parts
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Is it really necessary to put opamps in front of my ADC inputs?
Up until now I've been using the analog input stage from the EuroPi schematic as my model for a CV in. You can see it here:
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Easiest/cheapest way to get multiple (9-12) analog cv outputs (0-5V volt) from a single microcontroller/arduino
There is no super cheap way to get a lot of analog outputs from an MCU. Filtered PWM is your best bet for cost effectiveness (I recommend looking at the EuroPi from allen synthesis : https://github.com/Allen-Synthesis/EuroPi). Otherwise if PWM doesn't work for you, you'll need to look into DAC chips. The MCP4728 is a good spot to start, it's 12-bit and has 4 channels: https://www.adafruit.com/product/4470. Since it's I2C controlled you can have multiple of them on one bus. Maybe looking into a 16 channel PWM driver for a lot of outputs: https://www.adafruit.com/product/815. Hope this helps!
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My Raspberry Pi Pico based Eurorack module has a new software release!
The project is completely open-source and open hardware, and the contributors together have made this big list of scripts that you can run using a menu system!
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My reprogrammable DIY module (EuroPi) has just had a new free software release!
The project is entirely open-source but I do also sell the Panel+PCBs on my site!
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Best microcontroller for DIY modules?
Check out the EuroPi project https://github.com/Allen-Synthesis/EuroPi
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Firmware hacking with Uncertainty
EuroPi Turing Machine script is feeding the Uncertainty cv input with pulse 1 opening an envelope on Maths for voice 1 & 2, pulse 2 opens the second Maths envelope for sub osc voice 3. A little delay added for texture. That's pretty much it!
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Hardware List
EuroPi - A reprogrammable Eurorack module based on the Raspberry Pi Pico
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A Question, for anyone that knows how MI firmware code works
The patch.init() is still a great way to start, but you could save some money ditching the audio i/o and build yourself an EuroPi. However, that requires DIY, obviously.
ctag-tbd
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Embedded AND plugin... how ?
CTAG TBD is an ESP32 based universal module, look: https://github.com/ctag-fh-kiel/ctag-tbd
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Question: did anyone of you build a eurorack module with an ESP32 as sound source?
I've been curious about the Strampler, but noticed recently that most of the activity is now on the CTAG-TBD which is also ESP32 based. It already has an impressive set of FX and synth voice plugins, including several ports of Mutable Instruments ones.
What are some alternatives?
typhoon-manual - Manual / Cheatsheet for Typhoon module
super-sixteen - Code and schematics for the Super Sixteen Eurorack sequencer
MicroPython - MicroPython - a lean and efficient Python implementation for microcontrollers and constrained systems
HAGIWOs_Module - eurorack modular synthesizers projects using Arduino.
thonny - Python IDE for beginners
HardG - The Bongo Cat Eurorack Module
squares-and-circles - squares-and-circles is an alternate firmware for the Eurorack module O_C, targeting Teensy 4.
eurorack - Eurorack modules
Apeks - 12-bit through-hole adaptation of Mutable Instruments Peaks
esp32-eurorack-audio - Open source eurorack audio module based on ESP32
TuringMachine - Turing Machine Mk 2 Main Module
synth-modules - Synth module schematics and code