Audio support: As with HDMI 2.0 and 2.0a, all surround sound formats in use are compatible. HDMI 2.1 also adds eARC, which is an audio return channel upgrade that provides enhanced audio connection capability for immersive surround sound formats between compatible TVs, home theater receivers, and...
Regarding testing, it may be hard to know exactly if a TV has proper HDMI Forum VRR. Since the Xbox One X/S and Xbox Series X each support HDMI Forum VRR and FreeSync, we don't know for certain which format is working on the TV. Once the PS5 gets HDMI Forum VRR support, it'll...
eARC has an automated lip-sync feature, so theoretically, you’ll no longer need to jump into delay settings on your TV or audio gear to get a perfect match of sound and picture, the way you sometimes need to do when using HDMI ARC or optical connections. ...