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Comment by ashtonbaker | Hacker News Reader

It's a better experience for sure, but loading the app takes time, and it often (for me) takes a couple tries to pair with your apple tv. Also, you can't adjust the tv volume.

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If you have CEC or ARC setup, then you can adjust the volume by tapping on the buttons on the Lock Screen or using the iPhone volume buttons when the remote open.

I'm not sure what remote your are using, but the one built into the iPhones pull down menu is instant for me.

I'm not totally sure how it works (the only connection between my ATV and my AV system is HDMI) but adjusting the volume --- on my receiver --- works fine from the Apple TV iPhone remote.

It uses HDMI ARC but it's pretty flaky from the iPhone in my experience. Works more consistently with the remote itself. No idea why.

I'm pretty certain that the ATV remote beams good old fashioned infrared signals to change the volume on your TV/soundbar/receiver directly without involving the ATV itself.

I think this is right, because I had to teach my remote how to talk to my tv. Super odd, since every other box I've had has just been able to do this over HDMI.

The Apple TV remote doesn't emit infrared. The Apple TV does that itself! (This means that "learned" remote commands work even if you're controlling the Apple TV with your phone, or with a Bluetooth controller.)

The remote clearly has an IR blaster on the front though.

Are you telling me I should have my appletv positioned so that I can shine into my TV’s ir receiver?

Mine is behind the tv.

I find that hard to believe, but I'm willing to be wrong. My Apple TV HD is in a cabinet with solid sides and doors (3/4" MDF). The television is wall mounted above it, outside the cabinet, and maybe 12" behind the Apple TV. And yet the Siri Remote controls the volume on the TV. I'm pretty sure it's using IR from the remote to the television to control the television's volume. I guess there's some small chance the volume is being controlled with HDMI ARC, although I've never been able to get my iPhone to control the volume on the television.

Unfortunately I can't find any definitive source on the internet to confirm exactly what's going on.

It falls back to IR, but will use HDMI-CEC if available. Can be pretty fiddly to get it to work

I have two Sony TVs, one from 2016 and one from 2020, and they both work fine to control volume from the remote. One goes to a set of Homepods and the other on the TV itself.

The device itself probably uses CEC to do volume control, which can be a bit of a crapshoot with all the different vendors involved.

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