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Element 14 Releases A $33 Sound Card For The Raspberry Pi | TechCrunch
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Raspberry Pi Documentation - Raspberry Pi Audio
Audio Codec HAT - sound card with microphones for Raspberry Pi Botland - Robotic Shop
Sound Card HiFi DAC PCM5122 IS2 Interface 1GB ARM Audio Expansion Board Voice Adaptor for Raspberry Pi 3 Motherboard Computer - Newegg.com
Raspberry Pi 3 Audio Mini Pcie Sound Card Module With I2S Interface, HIFI DAC Expansion Board, And Black Acrylic Case From Speedin, $92.38 | DHgate.Com
Raspberry Pi X350 USB Audio Card with Microphone Input / Audio Input – Lonten Technology
Raspberry Pi gets its own sound card
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IQaudIO DAC+ Sound Card for Raspberry Pi 4B/3B+/3B - Micro Center
Amazon.com: RASPIAUDIO Audio DAC Hat Sound Card for Raspberry PI5 All Models Pi4 / Pi Zero / Pi3 / Pi3B / Pi3B+ / Better Quality Than USB (Ultra++) : Electronics
Audio Sound Card HAT Speaker Kit for Raspberry Pi Zero 2 W WH A 3 B Plus 4 | eBay