Blue ring around power/volume knob = Bluetooth input.I've been wanting to do this for awhile. The last time I had a look at Bluetooth playback quality was way back in the days of the Oppo Sonica DAC in 2017.Bluetooth has been our ubiquitous wireless audio transmission technology for more than 2 decades now; Bluetooth 1.0 was released in 1999 but it took a few years for the number of supported
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