Pico Audio Development Kit - Make your own digital synths!Designed by DatanoiseTV in Germany
What is it? The PicoADK+ (we had to change the name from PicoDSP to avoid confusion with Erica PicoDSP) is a RP2040 based Audio Development Kit, which allows you to build your own digital oscillators…Read More…
The PicoADK+ (we had to change the name from PicoDSP to avoid confusion with Erica PicoDSP) 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, plus a high quality Audio Output, 8 Analog Inputs for connecting potentiometers, control voltage from eurorack systems or even additional input signals.
I made it initially for myself to build digital oscillators for a hybrid synth and to experiment with the RP2040 as a DSP.
It has a 32-bit Audio Codec and an SPI 8x 12-bit ADC and is only longer by 4 pins on each side than the Raspberry Pico!
Interactive pinout at https://datanoise.net/picoadk/
Some signals are routed to internal peripherals as following:
|GPIO||Function||Shared w/ Header?|
|GPIO2||Debug LED 1||yes|
|GPIO3||Debug LED 2||yes|
|GPIO4||Debug LED 3||yes|
|GPIO5||Debug LED 4||yes|
|GPIO10||ADC128 SPI1 SCK||yes|
|GPIO11||ADC128 SPI1 MOSI||yes|
|GPIO12||ADC128 SPI1 MISO||yes|
|GPIO13||ADC128 SPI1 CSn||yes|
|GPIO15||Big Debug LED||no|
|GPIO16||PCM5100A I2S DAT||no|
|GPIO17||PCM5100A I2S BCLK||no|
|GPIO18||PCM5100A I2S LRCLK||no|
|GPIO24||VBUS Detect Pin||no|
The SPI ADC shares the GPIO10 to GPIO13, which are also present on the pin headers. Please be aware of that.
Make sure your software controls the XSMT and DEMP pins. The XSMT needs to be controled by the software to mute/unmute the audio output. With the DEMP pin you can control the Deemphasis for 44100 Hz.
You can find software examples at https://github.com/DatanoiseTV/RP2040-DSP-FreeRTOS-Template (currently some rework in progress, this was for the first "Big PCB" version).
This template contains the I2S codec drivers, A custom build step for Vult DSP based projects and a synthesizer as an example and should be a good starting point for most projects.
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