Check the HDMI ports for an “ARC” label, then review the device specifications or manual for “HDMI Audio Return Channel” support. You can also look in the TV, receiver, soundbar, or switch settings for ARC or Consumer Electronics Control (CEC) options, since ARC commonly works through CEC.

When choosing HDMI ARC cables, extenders, or switches, consider the required distance, video resolution and bandwidth, cable pathway, and whether the equipment supports ARC, CEC, HDCP, and the audio formats used in the system. For residential or commercial installations, also evaluate control needs, audio outputs such as HDMI ARC or S/PDIF, power options, in-wall requirements, and features such as IR, RS-232, Ethernet, or EDID management.

HDMI ARC sends audio from a compatible display back to an audio system, while an extender carries that return signal over twisted-pair cable such as Cat 5e or higher, often alongside HDMI, control, and other signals. Fiber-based HDMI cables or extenders transport the ARC-enabled HDMI connection over longer runs, which can help connect displays to remotely located receivers, amplifiers, or other audio equipment.

Use HDMI ARC with S/PDIF as an alternate digital audio connection when the display lacks ARC capability or ARC settings are not working as expected. This approach gives installers a fallback for sending audio from a display to a centralized amplifier or audio system, while supporting flexible system design.