USB-C to 3.5mm headphone adapter not working

That should work , try rebooting ?
See if there's a update for headphones in galaxy store also
 
Make sure the headphone jack part of the adapter is clear of any debris.

Also, where did you buy it from -- Best Buy, or some lesser-known seller?
 
Assuming the OP actually bought the adapter from Best Buy, it should work (the listing is for the official Samsung adapter, and the specs do confirm it has a DAC).

Oops I guess I should have checked the links first lol, thanks.
 
Sorry, was asleep.

My 2nd pair of headphones behave the exact same way. Both pairs of headphones work when plugged in to a phone or tablet that has an old-school headphones jack.

The device was purchased at Best Buy. I knew buying from (say) Amazon would be a crapshoot. I didn't realize the forum would convert my URL to an affiliatelink, sorry.

Thanks for the confirmation that this should work. Given that the music still plays from the phone speaker when I plug it in, I suspect the phone isn't detecting it, and it's probably defective. I'll try returning it.
 
Try clearing out the headphone jack part of the adapter with a can of compressed air first. If it still doesn't work, then I agree with returning it.
 
Sorry, was asleep.

My 2nd pair of headphones behave the exact same way. Both pairs of headphones work when plugged in to a phone or tablet that has an old-school headphones jack.

The device was purchased at Best Buy. I knew buying from (say) Amazon would be a crapshoot. I didn't realize the forum would convert my URL to an affiliatelink, sorry.

Thanks for the confirmation that this should work. Given that the music still plays from the phone speaker when I plug it in, I suspect the phone isn't detecting it, and it's probably defective. I'll try returning it.

Keep us updated
 
Let us know what happens. I have the same dongle from Best Buy, and mine works fine with all my headphones. It sounds like you were unlucky and got a defective unit.
 
I returned the Samsung one to Best Buy and bought one from Amazon (Anker, a name I trust). This behaves better, in that the controls on the headphones (vol up, vol down, pause/play) all work (they didn't with the Samsung dongle), but the audio output still goes to the phone speaker, not the headphones. I've triple-checked there is no lint in any of the connections.

I'm using the Samsung Music app, and if I hit the "Media output" button in the drop-down for the player on the notification, I get to choose from various remembered Bluetooth connections, or "This phone", but not "the headphones attached to the USB-C connector".

I must be doing something wrong.

Is there some other setting to tell the phone to use wired headphones instead of the built-in speaker? Everything I've read says simply plug it in and go.

Is there some other player I should try? Something that can handle offline MP3s.

Thanks.

Edit: PS - the Samsung dongle didn't work on my Pixel 5 either, but the Anker one does. So the Anker one at least works for one phone (just not the one I need it for).
 
I'll give that a try, thanks. We're off on a trip (with her bulky tablet for music), so responses may be delayed.