Most Android phones can connect and stream audio to one Bluetooth device. But there may be situations where you may want to stream to multiple devices instead. For example, you own a pair of portable Bluetooth speakers that can’t be paired in stereo mode but would prefer the audio to be louder. Another example would be if you wanted to use your earphones and speakers simultaneously. You can accomplish all this with Samsung’s Dual Audio feature. It allows you to stream audio to two Bluetooth devices without switching.
Dual Audio and Multipoint audio are two different features. Dual Audio streams audio to two earphones or speakers simultaneously. Multipoint audio is available on the best wireless earbuds, which allows them to connect to two devices and switch between them seamlessly. For example, you can connect your Pixel Buds Pro to your phone and laptop and move between the two devices without issues.
See https://www.androidpolice.com/what-is-samsung-dual-audio
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