The headphone jack’s days are numbered. If you’re adapter-averse, Bluetooth earbuds and headphones are one of the few in-ear and on-ear alternatives, and they’re far from a perfect solution. Middling battery life and dropout issues aside, they tend to introduce latency compared with their wired brethren — not to mention compression and other artifacts.

Qualcomm says it has the solution, though, and it involves the next generation of Bluetooth. It today debuted the QCA6390, a

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