audiomacos
I would like to send music (Spotify app) to the Bluetooth speakers but keep all other sounds (notifications, etc) on the earphones.
Is this possible?
From what I can find online I need a 3rd party app (can't do it from the OS).
Most of the results are about sending all audio to multiple outputs, thus creating the output aggregate device using audio midi setup built-in app.
Version: MacOs Catalina 10.15.5
The only way to do this without a third party app is directly from iTunes. In the top area of the iTunes windows you'll see the AirPlay icon. Click on that and then select Multiple to select multiple AirPlay targets to stream the audio (and/or video) to at the same time:
To stream to multiple AirPlay devices from outside iTunes you'll need to invest in some third party applications. The best approach I know of uses Airfoil for Mac from Rogue Amoeba. Airfoil allows you to send audio to many destinations from your Mac. From their page:
Multiple Outputs At Once You can send audio to multiple outputs around your house, all in sync.
It's an excellent app from an excellent Mac-centric development company and for $25 you get an excellent solution to your problem.
Try making sure that your source format (Hz) and bitrate are set to the same on both devices. My guess is that if they are different, you may have one receiving information at one rate but transmitting as another.
Best Answer
Unless anyone can come up with a freeware solution, SoundSource is your best bet. It's about $£€ 30, depending on local tax.