ArcBridge by Bridgeway Audio — a Raspberry Pi Pico 2 based HDMI audio embedder/DDC with TOSLINK and coax S/PDIF inputs, HDMI TMDS output with dummy video, ARC return audio, and CEC participation, powered from the Pico USB-C port.

TOSLINK Fiber Optic Receiver, ORJ-8, Digital Audio, 16Mbps, 2.7V-5.5V, Cliff Electronic Components TOSLINK optical receiver fiber optic SPDIF digital audio ORJ-8 Cliff FCR684208R*