eARC: Making ARC even better Simon Cohen / Digital Trends With HDMI ARC, you can ditch your soundbar or receiver’s remotes - as soon as you start watching content that originates from your TV, your connected soundbar or receiver will automatically switch to the correct input. You may also have to enable or disable your TV’s built-in speakers each time you switch.
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Normally, when using an optical connection from a TV to a receiver or soundbar, you need to manually switch to the optical input when you want to hear your TV’s sound, and then switch back to the HDMI inputs on the receiver or soundbar when you want to go back to watching an external source of content. Always pay close attention to a product’s specifications to know what it can or can’t do. For instance, some TVs will play Dolby Atmos using their built-in speakers, but they can’t pass along that same Dolby Atmos content via their HDMI ARC connection (known as Dolby Atmos passthrough). There is a caveat here: Even though HDMI ARC can transmit higher-bandwidth formats like Dolby Atmos, your TV still has to support these formats. HDMI ARC, with its larger data capacity, can transmit these formats too, so if you’re using your TV to stream a Dolby Atmos title from Disney+, you’ll be able to send that signal to your compatible A/V receiver or soundbar. However, throw a newer surround sound format at it, like Dolby Atmos or DTS:X, and it chokes. Optical cables are great for sending Dolby Digital 5.1 surround sound from device to device. HDMI ARC brings that simplicity back by letting you once again use a single cable for all your needs. That not only destroyed the simplicity of a single-cable connection, but it also meant you needed to press some additional buttons to get things working every time you switched to using your TV as the sound source. Before the advent of HDMI ARC, if you wanted to hear these sources on your receiver’s speakers instead of the ones built into your TV, you needed to run a second cable (typically an optical cable) from your TV back to your receiver. Some TVs have their own streaming apps or TV tuners. So far, so good.īut not every source of video you might want to watch comes from an external device. If you own an A/V receiver, and you plug in your Blu-ray players, game consoles, or streaming device into it, the receiver will play the audio portion through your home theater speakers and send the video portion along to your TV. ARC: Audio return channelĪs the name suggests, Audio Return Channel - which gives us the “ARC” in HDMI ARC/eARC - adds the ability for a TV to send audio backward along an HDMI cable to its source device. It wasn’t until a later revision of the HDMI standard (HDMI 1.4) that this began to change. The only exception to this is HDMI Consumer Electronics Control (CEC) - a very low-bandwidth set of commands that could be sent in both directions along an HDMI cable, so that a TV’s remote could control an A/V receiver’s volume, or the power button on an A/V receiver’s remote could turn off a TV. Audio and video traveled from a source device to a TV (or projector) and never the other way around. When it was introduced, that digital superhighway was limited to a single direction of flow.
Fitbit Versa 3īut despite its nearly universal implementation, not everyone knows what ARC is or what it does.
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