This is a simple audio file player based on the Raspberry Pi Pico boards that plays high quality audio files from an SD card.
There's a video here, showcasing the project.
- Plays uncompressed audio files (44.1khz 16 bit WAV files, but more coming) from an SD card
- Can be used with cheap high quality DAC
- Based on Arduino Audio Tools and Platformio, so you can easily fork this project and use it for another audio project.
- The onboard BOOTSEL button works as a NEXT-button to go to the next audio file in the player.
Note: To make this run smoothly, the Pico 1 is overclocked to 270mhz. Do this at your own risk.
To make this project, you need:
- An SD card reader module
- A DAC module
- A Raspberry Pi Pico board
These components cost less than 10€ in total usually.
I use a PCM5102A i2s DAC board from Ali Express / Ebay / wherever for this.
Note, if you are using the same, please make sure the jumpers on the back are soldered like this, otherwise it will be muted by default:
| PCM5102A Pin | Pico PIN | Notes |
|---|---|---|
| SCK | GND | |
| DIN | GPIO28 | |
| LCK | GPIO27 | |
| BCK | GPIO26 | |
| GND | GND | |
| VIN | 3V3 |
I use this simple and cheap SD card reader from Ali Express / EBay / wherever:
Please make sure your sd card reader module's power requirements. Some only take 3.3v, others only 5v. Adjust accordingly:
| SD card pin | Pico pin |
|---|---|
| MISO | GPIO16 |
| MOSI | GPIO19 |
| CS | GPIO17 |
| SCK | GPIO18 |
| VCC | VSYS (unless your SD card module is a 3V one, then connect it to 3V3(OUT)) |
The SD card should be formatted as FAT32. Don't use low quality / off brand SD cards. You'll be sorry if you do.
Audio files should be in the format 44.1khz sample rate / 16 bit.
This project is built with Platformio. With a Raspberry Pi Pico connected to your computer, you can compile and upload the firmware in one go from the command line by running this from the root of this project:
pio run -t upload