I have for sale a Hifiberry Digi+. This is used to take a direct I2S signal from a Raspberry Pi, and output clean digital over SPDIF or optical. This is the upgraded version with an output transformer for full galvonic isolation and better sound from the SPDIF output. It's super easy to install, with no soldering or real DIY work to worry about. It's plug and play supported in Volumio, Moode, and Rune Audio too (probably others as well).
Link:
https://www.hifiberry.com/digiplus/It was used exactly once, so I can confirm that it works. I just decided to go a different way with my system and it's not needed.
This is $50+ shipping new, offered here in absolute pristine condition for $30, including shipping (US lower 48 only) and PayPal. I have good feedback on here, and I'm eric_browning on eBay and Audiogon, with tons of history on both.
Thanks,
Eric B.
