Play sound from iPhone thru Macbook to external output

Solution 1:

Get an inexpensive bluetooth HD receiver and cut out all the middle men and making macos delay the audio is my suggestion. Rogue Amoeba is the only company I know that meets your quality requirements.

• Esinkin Bluetooth Receiver Wireless, NFC-Enabled Audio Adapter 4.0 for HD Home Stereo Music Streaming Sound System for 3.5mm (AUX and RCA) https://www.amazon.com/dp/B07TK8ZKQT/ref=cm_sw_r_cp_tai_xzFIEbX8B4NBV
• AirFly Pro is awesome - https://www.twelvesouth.com/products/airfly?variant=30720749109305

There are dozens of great options for less than $25 Cost so all your devices, Mac and iOS can play to your audio system.

If you must go bluetooth to Mac, try AirFoil - you’re right you don’t need loopback or the full suite and processing.

• https://www.rogueamoeba.com/airfoil/mac/

There are other Wi-Fi / Airplay options for macOS , but AirFoil is what I recommend.