After starting an Android emulator on a Mac the sound quality of a connected bluetooth headset can degrade. This happens because the emulator requests an access to a microphone which is the one build in to the connected bluetooth headset. MacOS provides the access to the microphone and switches current bluetooth profile to a lower quality one used for speech. This degrades sound quality.
If microphone is not a required feature for your task, the microphone can be disabled in the emulator as follows:
Device Manager, then click on the “three vertical dots” icon of the emulator.Show On Disk option.Finder find and open for editing the config.ini file.hw.audioInput property and set it to hw.audioInput = no.Now you should be able to enjoy the music in high quality and developer your awesome app at the same time.