HDMI ARC on a Smart TV: What It Means and How to Use It

If your smart TV has an HDMI port labelled ARC, it can send sound from the television to a compatible soundbar, AV receiver or home theatre system through the same HDMI cable used for audio and video connections. ARC stands for Audio Return Channel, and it is designed to reduce cable clutter while making external audio equipment easier to control.

For viewers in Australia, this is useful whether you are watching free-to-air channels, Netflix, Stan, ABC iview, Kayo Sports or a device connected to the TV. Once set up correctly, the TV remote can often adjust the soundbar volume, while the television sends Dolby Digital or other supported audio formats to the speaker system.

What HDMI ARC actually does

A standard HDMI connection usually carries video and audio from a source device, such as a Blu-ray player or streaming box, to the TV. HDMI ARC reverses the usual audio direction. It allows sound generated by the TV itself to travel back out through the ARC-labelled HDMI socket.

This includes audio from built-in smart TV apps, live television, connected gaming consoles and other HDMI devices, depending on how your system is wired. Instead of using a separate optical audio cable, you can connect one HDMI cable between the TV and the soundbar or receiver.

ARC is different from a normal HDMI input. The port may still accept video devices, but its special audio-return function only works when it is connected to an ARC-compatible output on the soundbar or receiver. Look for labels such as “HDMI ARC”, “HDMI OUT (ARC)” or “eARC”.

ARC and eARC are not the same

HDMI eARC is the newer version of the feature. It supports substantially higher audio bandwidth, which means it can carry formats such as uncompressed multichannel PCM, Dolby TrueHD and DTS-HD Master Audio when the television and audio equipment both support them. eARC can also be more reliable with audio formats used by newer home theatre systems.

Regular ARC is usually sufficient for a soundbar, television speakers with a subwoofer or everyday streaming. It commonly supports stereo, Dolby Digital and Dolby Digital Plus, although the exact capabilities depend on the TV, source and sound system. A TV with eARC can generally work with an ARC soundbar, but the connection will operate at the older ARC standard.

Check the specifications rather than relying only on the HDMI version number. A television might have HDMI 2.1 ports without every port supporting eARC, while some older TVs include ARC on a particular HDMI socket. The labels in the manual or on the rear panel are the most dependable guide.

How to connect a soundbar with ARC

Start by switching off the TV and soundbar. Connect one end of a suitable HDMI cable to the TV socket marked HDMI ARC or HDMI eARC. Connect the other end to the soundbar socket marked HDMI OUT, HDMI TV-ARC or HDMI eARC. Do not use an ordinary HDMI input on the soundbar if it has a dedicated output for the television.

Turn both devices on and select the HDMI ARC input on the soundbar if it does not change automatically. On the TV, open the sound or audio settings and choose an option such as HDMI audio system, receiver, external speakers or sound output. The wording varies between brands including Samsung, LG, Sony, Hisense and TCL.

You may also need to enable HDMI-CEC, the control feature that lets devices communicate. It appears under different names: Anynet+ on Samsung, Simplink on LG, Bravia Sync on Sony and HDMI-CEC on several other brands. Turn on the relevant device-control setting, then test the TV remote’s volume and mute buttons.

Choosing the right cable and audio settings

For basic ARC, a High Speed HDMI cable is normally adequate. A Premium High Speed cable is a sensible choice if you already have one, particularly when the same connection also carries high-resolution video. For eARC, use an Ultra High Speed HDMI cable or a certified cable recommended by the equipment manufacturer.

The audio output setting often determines whether the connection works properly. Begin with “Auto”, “Bitstream” or “Pass-through”, depending on the TV menu. If you hear no sound, try “PCM” as a compatibility test. PCM may reduce surround-sound capability, but it can show whether the problem is caused by an unsupported Dolby or DTS format.

Some Australian streaming services and free-to-air broadcasts use different audio formats from one programme to another. A soundbar may work with Netflix but remain silent on a particular live channel if its format is unsupported. TVs connected to Foxtel, Fetch or a Chromecast may also require their audio output settings to be adjusted separately.

Common ARC problems and fixes

No sound is often caused by using the wrong HDMI socket. Check both ends of the cable and confirm that the TV connection is specifically labelled ARC or eARC. Then make sure the soundbar is set to its TV ARC source rather than Bluetooth, optical or a standard HDMI input.

If the sound cuts out, disconnect both devices from power for about a minute and reconnect them. This refreshes the HDMI handshake, which is the process used to establish communication between the television and audio equipment. Installing firmware updates on the TV and soundbar can also resolve compatibility faults.

Volume control problems usually point to HDMI-CEC being disabled or inconsistently enabled. Turn CEC off and on again on both devices, then restart them. If the TV keeps switching back to its built-in speakers, select the external audio system again and check that the soundbar is powered on before the TV starts.

Where ARC fits into an Australian lounge room

ARC is particularly convenient in homes where the television is used as the central entertainment hub. A family in Brisbane might use a smart TV for ABC iview and Stan, a PlayStation for gaming and a soundbar for evening films. With ARC, audio from each source can be routed through one speaker system without changing several cables.

Australian retailers such as JB Hi-Fi, The Good Guys and Harvey Norman commonly sell soundbars labelled with ARC or eARC. When comparing models, check whether the soundbar has HDMI input and output, rather than assuming every HDMI socket supports audio return. Entry-level products may include optical audio but no ARC connection.

Wall-mounted televisions also benefit because one HDMI cable is tidier than a separate optical lead and can support remote control functions. In apartments or smaller rooms in Melbourne, Sydney or Perth, a compact soundbar with a wireless subwoofer can provide clearer dialogue without the space required for a full receiver and speaker package.

ARC is also useful when replacing an older setup. If your TV has ARC but the soundbar only has optical input, optical audio can still work, but you will lose some control features and possibly certain audio formats. If both devices support eARC, use that connection for the best compatibility with modern consoles, Blu-ray players and high-quality streaming audio.

A practical setup is simple: connect the ARC-labelled TV port to the soundbar’s HDMI ARC output, enable external speakers and HDMI-CEC, select Auto or Pass-through audio, and test several sources. If the system fails, try PCM, restart both devices and confirm that the cable and ports support the same ARC or eARC standard.