This is a great device if you know what you are getting and what you are trying to do. TL;DR: READ THE MANUAL, it might solve your problem! Not all functions of this key are immediately apparent! This solves Qualcomm's absolute idiocy in licensing AptX codecs, specifically two of its most useful variants, HD and LL. (You'd think they took lessons from Oracle!) As a result, most Bluetooth PC adapters and driver packs can't legally ship the AptX codec, and Microsoft doesn't seem keen on agreeing to an absurd contract. becoming the default Bluetooth audio component of Windows (not to mention Linux or most other non-PC devices like game consoles). Only very select OEMs such as Dell have licensed the codec for specific models with non-Qualcomm Bluetooth chipsets. Instead of trying to run the codec on the host (PC etc), this device gets around the problem by presenting itself as a *USB AUDIO* device, *NOT BLUETOOTH DEVICE*. This may seem counterintuitive at first, but it's a good thing. USB audio is a well-supported standard across all operating systems and devices, so you might be able to use it with gaming consoles like the Nintendo Switch (make sure you use LL!) that support standard USB audio peripherals. Since the host only sees the USB audio card, it doesn't matter whether AptX is licensed for that platform or not - all Bluetooth logic (and therefore AptX transcoding) takes place on the Qualcomm chip in that dongle. I wish it could output in 44.1kHz instead of just 48kHz to avoid an extra layer of oversampling, but there was no noticeable degradation in quality in HD mode with a lossless source. I haven't been able to test the QuickStream codec - I can put the dongle in communication mode, but I think my bluetooth receiver may not support the codec or may not like the way this device transmits the codec. For others it seems to work, so I can't blame the device for that, especially since my use case is done for output only. Bonus: If your peripheral like Bluewave GET (the one I tested it with) has hardware buttons, this dongle will act as a compound device and pass them to the host computer.
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