HIFI DAC+ I2S port sound card for Raspberry Pi: The PIFI DAC extension card (PiFi DAC +) is dedicated to Raspberry Pi 2/3 / B +, it includes a DA chip
Raspberry Pi 5
PiFi DAC+ v2.0 - HiFi sound card for Raspberry Pi - Kamami on-line store
PIFI Digi DAC and HIFI DAC Audio Sound Card Module I2S interface for Raspberry pi 3 2 Model B, B Plus - RS112
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WM8804G I2S Coaxial Optical HDMI PIR HiFi DAC Digital Audio Sound Card Decode Board for Raspberry Pi 2B+ 3B 3B+ 4B DSD64 256 512
Playing sounds from the Raspberry Pi Pico using CircuitPython - a journey of discovery - Raspberry Pi Pod and micro:bit base
Raspberry Pi 3 on sale now at $35 - Raspberry Pi
IR photo switch module
PCM5100A Stereo DAC with PAM8908JER stereo headphone amp I2S expansion board for Raspberry Pi Pico and programmable in C and C+ only 3.5mm stereo
Pico Audio Pack Stereo DAC
The Raspberry Pi - Piitel
Raspberry Pi Zero: the $5 computer - Raspberry Pi