this post was submitted on 02 Feb 2025

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Same audio to 4 Bluetooth headsets (lemmy.ml)

submitted 21 hours ago by [email protected] to c/[email protected]

8 comments fedilink hide all child comments

I'm starting a running program with my family. Part of the fun is building a shared playlist and listing to cues together. I'd like to run the audio off one phone and have it go simultaneously to 4 headsets. I see there's phone apps that do today but my kids don't have phones. Is there a hardware device that can do this?

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[–] [email protected] 7 points 14 hours ago* (last edited 13 hours ago)

Incoming infodump. I agree with another commenter that Auracast ist exactly what you want, problem: barely available.

Bluetooth is split into 2:

Bluetooth Classic

Bluetooth Low Energy

Auracast is a very new standard using BLE Audio. I've seen some aliexpress sellers selling Auracast hardware for silent discos. But from well known brands I haven't seen a thing

Most BT headphones you buy use Classic, and cannot achieve multiple connections. So no built in solution.

Obviously there are proprietary Technologies that had custom transmitters/recievers for this exact usecase.

TLDR: If your Phone can do BLE Audio you could gamble on some Auracast hardware from aliexpress. Else, look for premade solutions not using Bluetooth

[–] [email protected] 2 points 15 hours ago

Auracast is basically what you're after but not out yet. I think a couple of transmitters and a headphone splitter is your best bet. There are products like this but you need to use their headphones and figure out power for the transmitter. It is USB C though, looks like a power bank would work.

[–] [email protected] 1 points 14 hours ago

My old Samsung phone could output to two Bluetooth devices at the same time, but it wasn't exactly synchronized. I don't think Bluetooth is good at getting the timing just right.

[–] gedaliyah 3 points 20 hours ago (1 children)

There are apps that will synchronize audio, like snapcast. But yes, you would need individual devices.

You can also find a device that is capable to send two BT signals but I'm guessing one that sends 4 might be pro audio level.

[–] gedaliyah 10 points 20 hours ago

Also, if you have a headphone jack, you could use a 4-way headphone jack splitter and 4 of those little car audio bluetooth adapters. A little hacky, but it wouldn't break the bank.

[–] [email protected] 2 points 18 hours ago (1 children)

If you have a Mac of some kind, you can pair and output to multiple headphones:

https://support.apple.com/en-au/guide/audio-midi-setup/ams7c093f372/mac

Doesn't help you with android of course, but if you dont find a solution that might be worth looking at.

[–] juli 2 points 17 hours ago (1 children)

How is a mac connecting to multiple bt devices help while running outdoors? Do you carry the mac along?

[–] [email protected] 2 points 16 hours ago

If its a laptop, yes. I was only suggesting it in case someone else finds this post later and finds it a suitable solution, I dont think it'll work for the OPs use case.