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Dodepan

Portable electronic musical instrument and Midi controller with a built-in synthesizer, looper, and expressive modulation.

turiTuri
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Dodepan is a portable electronic musical instrument and Midi controller based on Raspberry Pi Pico 2 that features a built-in synthesizer, looper, and expressive modulation.

It's played by tapping on its twelve (dodeka in Greek) capacitive metal pads. The instrument features I²S audio output, a rotary encoder for parameter selection, an SSD1306 OLED display, and an MPU-6050 IMU for velocity and pitch bending data.


Compared to the original version, this iteration offers several improvements:

* Raspberry Pi Pico 2 as the central unit
* Better audio quality using an I²S DAC and power amplifier
* An SSD1306 OLED display
* A rotary encoder for navigation and parameter selection
* Direct digital synthesis engine
* 9 instrument presets, plus 4 slots for user presets
* Filter cutoff frequency modulation controlled by device tilt
* Sequence looper with diatonic transport selector
* Volume control
* Extended note range
* Automatic storage and retrieval of last used settings
* Fewer components

Dodepan v2 also sports an amplified output with speaker disable. While it can work fine with some headphones, the signal from the audio jack must be attenuated before being connected to sensitive equipment. A resistor between 1.2KΩ and 4.7KΩ is recommended.

  • 1 × Raspberry Pi Pico 2

  • 1
    Assembly of the PCB version

    Please refer to the Assembly guide on the main repository.

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Toon wrote 10/16/2024 at 09:26 • point

Great project. Would like to build one myself

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woceten892 wrote 07/25/2023 at 03:49 • point

TellHappyStar Businesses like Hardee's and Carl's Jr. keep tabs on how their customers' behavior changes...

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David Warner wrote 04/11/2023 at 07:48 • point

The project is impressive, with thoughtfully designed features!

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danjovic wrote 03/29/2023 at 21:31 • point

Awesome project, with many well thought features!

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Turi wrote 03/29/2023 at 22:36 • point

Thanks. A big update is coming up!

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