PicoADK - Audio Development Kit

A RP2040-based Board with 32-bit Audio Output and 8x 12-bit 1MSPS ADC for creating standalone synthesizers and noise boxes.

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Description

The PicoADK is a RP2040 based Audio Development Kit, which allows you to build your own digital oscillators, synthesizers, noise boxes and experiment around. It has all the base features of the Raspberry Pico / RP2040, plus a high quality 32-bit Audio Output, 8 Analog Inputs for connecting potentiometers, control voltage from Eurorack systems or even additional input signals.

Even though it is very small, it is capable of synthesizing and outputting a very high quality sound output. Thanks to the Vult DSP language you can even create digital resonant filters, oscillators and even complete synthesizers!

All of the firmware is open source and it includes a template to get started with:
* USB MIDI
* FreeRTOS
* I2S Audio DAC
* Vult DSP based DSP Programming
* ....

Details

RP2040 Dual Core Cortex M0+ running at up to 400MHz
USB Type-C connector
2MB Flash for Firmware and Data
Very low noise LDO regulators (separate LDO for digital circuits and separate for analog circuits), no switching regulators
Partially pin-compatible with RP2040 (besides a few pins internally used or rearranged), extra 4 pins on each side
Audio DAC PCM5100A, up to 32-bit output
Very high audio signal quality and very low noise
Dedicated Boot and Reset Buttons
8 channel 12-bit ADC with up to 1MS/s, with selectable 3.3V range (on-board low-noise power supply) or range up to 5V via external VREF
Low-Pass filter on each ADC input (fMax=48 KHz) at low-impedance (100 Ohm). With 5V VREF suitable for CV (no overvoltage protection, unipolar)
Symbols marking special pin functions on the pin headers
4 LEDs on shared GPIO2-5 for debugging
ESD Protection on USB
SWD Debug Port