This HDMI Audio Extractor can be used with a home theater system by taking the audio from a HDMI source and extracting out to Toslink S/PDIF or Right/Left composite audio.
Analog to digital audio converter with 2xRCA to toslink and coax - Cablematic
HDMI Audio Extractor: A Guide for Beginners 2023
WyreStorm Essentials™ HDMI Audio Extractor
Habitech - WyreStorm Analogue and Digital Audio Extractor With HDMI Passthrough and Audio EDID Management
192KHz HDMI-compatible Audio ARC Extractor HDMI-compatible ARC To Toslink + Coaxial + L/R Converter Audio Return Channel Adapter
How to convert the HDMI ARC audio output of a television to analog audio RCA jacks - Quora
New TV without RCA connection - how to connect my old receiver?
Simplified MFG DAC1 HDMI audio extractor with multi-channel-to-stereo downmixing at Crutchfield
4K HDMI Multiviewer 4x1 Audio Extractor 8 Display Modes-BUNGPUNG
Deliver audio to devices without HDMI inputs by extracting the digital audio embedded in an HDMI source
HDMI® Audio Extractor with TOSLINK, SPDIF and 3.5mm - 4K 60Hz
Temu
The 1 euro HDMI input solution for your next DIY DAC
SPDIF HDMI-COMPATIBLE AUDIO Extractor Adapter 3.5mm Audio Splitter Converter $21.75 - PicClick AU