What is that single-note xylophone notification sound when my iPhone starts up?

[dandeco]

For a while after upgrading my iPhone 14 to iOS 26, I noticed when I start it up, as I get the notifications during the middle of them I hear a single xylophone note, in the key of E. I can't trace exactly what it's a notification for; I initially thought maybe it was for the Kentucky Fried Chicken app on my phone, but it wasn't. Then I checked all my notification settings and couldn't find which app could possibly make it.
Anyone here know what I am talking about?

 

[kissfan]

It’s simply Apple’s boot-up sound.

 

[dandeco]

Wait a minute, I found the sound, the first xylophone note at 0:06 here:

Despite not being connected to a MagSafe device, maybe the sound means MagSafe is starting up?

 

[Capeto]

Official Apple cases with a MagSafe ring will trigger that sound when you put the case on. Are you using such a case?

 

[Micahrea]

If it only happens during startup, it is most likely just a delayed system notification rather than anything unusual.

 

[dandeco]

Official Apple cases with a MagSafe ring will trigger that sound when you put the case on. Are you using such a case?

I figured that was the case! (No pun intended.) Thanks for confirming that for me; I have an Apple case that fits my iPhone 14.