I have some questions about streaming audio.

[J.Kwon]

I know that BLE is not suitable for high-volume streaming.

So how do BLE earphones stream audio?

Does it use with bluetooth classic protocol?

And I coundn't monitor advertising packet of the BLE earphons, using packet sniffer(CC2540 dongle).

Is it related to multiprotocol??

[endnode]

There should be no "BLE" earphones, just "BT" (aka Bluetooth meaning they are using BR/EDR "classic" part of the stack, typically A2DP standard protocol for HD audio transfer over Bluetooth). If there are "BLE" audio streaming applications you will find them only in very specialized segments and they typically need special HW+SW on both sides (so if your "BLE" headphones work with Mobile phone or PC out of the box they are definitely not "BLE" because there is no SW which would make the audio streaming over BLE on mobile or PC).

[J.Kwon]

Thank you. It's very helpful.