Making USB sound card using Raspberry pi pico

Capture audio from a microphone on your Raspberry Pi Pico or any RP2040 based board. 🎤

Hardware

• RP2040 board
  • Raspberry Pi Pico
• Microphones
  • I2S
    • [inmp441]
  • PDM
    • PDM mic
• DAC
  • PCM5102A
  • UDA1334A
• LCD
  • SSD1306
• Buttons
• LEDs
  • WS2812
• Resistors

Examples

See [applications]:

• stereo_microphone_i2s
• stereo_microphone_pdm
• stereo_speaker

Cloning

git clone https://github.com/denisgav/rpi_usb_sound_card.git

Building

1. Set up the Pico C/C++ SDK
2. Set PICO_SDK_PATH

export PICO_SDK_PATH=/path/to/pico-sdk

3. Create build dir, run cmake and make:

mkdir build
cd build
cmake .. -DPICO_BOARD=pico
make

4. Copy example .uf2 to Pico when in BOOT mode.

Acknowledgements

To create this project, following references were used:

• The TinyUSB library.
• Machine I2S https://github.com/sfera-labs/arduino-pico-i2s-audio
• Microphone library for pico https://github.com/ArmDeveloperEcosystem/microphone-library-for-pico.git
• SSD1306 library for pico https://github.com/daschr/pico-ssd1306.git

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