EuroPi
EuroPi: A reprogrammable Eurorack module based on the Raspberry Pi Pico (by Allen-Synthesis)
DLD
Dual Looping Delay module (by 4ms)
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| EuroPi | DLD | |
|---|---|---|
| 34 | 2 | |
| 390 | 45 | |
| 4.6% | - | |
| 8.7 | 0.0 | |
| 16 days ago | 6 months ago | |
| Python | C | |
| Creative Commons Zero v1.0 Universal | GNU General Public License v3.0 or later |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
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.
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
Posts with mentions or reviews of EuroPi.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2023-06-15.
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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.
DLD
Posts with mentions or reviews of DLD.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2022-12-16.
- Hardware List
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Real-time Audio Processing Question
A 4-input 4-output “crossfading” delay using an STM32F427 and external SDRAM chip (32MB). Achieves up to 3 minutes of 48kHz/16bit stereo delay time, less if you use 24bit. https://github.com/4ms/DLD
What are some alternatives?
When comparing EuroPi and DLD you can also consider the following projects:
typhoon-manual - Manual / Cheatsheet for Typhoon module
SMR - Spectral Multiband Resonator
MicroPython - MicroPython - a lean and efficient Python implementation for microcontrollers and constrained systems
stm32mp1-baremetal - Baremetal framework and example projects for the STM32MP15x Cortex-A7 based MPU
thonny - Python IDE for beginners
eurorack-awesome - awesome eurorack diy and opensource
squares-and-circles - squares-and-circles is an alternate firmware for the Eurorack module O_C, targeting Teensy 4.
JUCE - JUCE is an open-source cross-platform C++ application framework for desktop and mobile applications, including VST, VST3, AU, AUv3, LV2 and AAX audio plug-ins.
Apeks - 12-bit through-hole adaptation of Mutable Instruments Peaks
SWN - Spherical Wavetable Navigator source code
TuringMachine - Turing Machine Mk 2 Main Module
STS - Firmware for Stereo Triggered Sampler, a eurorack module from 4ms Company