Weird USB Bluetooth Music receivers

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====== Weird USB Bluetooth Music receivers ======

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My USB powered bluetooth audio receiver STARTED SHOWING UP AS A MASS STORAGE device.
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I DIDN'T EVEN KNOW THAT THING HAD DATA LINES?!?
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Did I get rubber-duckied by a BLUETOOTH RECEIVER?
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WAIT YOU CAN MOUNT THE STORAGE DEVICE?!?

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WTF IF YOU PLAY IT, THE FILE HAS LEGIT MP3 TAGS

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OH SHIT I Think this is for it to work on crappy stereos that just play MP3 from a flash drive!!!
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To adapt them to work with bluetooth
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hm I don't hear anything and the mp3 file exits though
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so I guess you need a dumber player that doesn't try to seek in a file
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WAIT I THINK I KNOW WHAT THE OTHER FILES ARE
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YOU CAN'T PLAY THEM, BUT IF YOU OPEN IT, IT TELLS THE PHONE TO GO TO THE NEXT SONG
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so it's used to detect when you pressed previous/next!!! and from that, it signals to the bluetooth device to go back/forward
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who the f*** makes this ASIC?!? There's no way this thing is economies of scale