"COAXIAL 1", "COAXIAL 2", "OPTICAL": Desired DIGITAL IN jack can
be assigned to PHONO button. If you do not assign a jack, select "-----".
Supported sampling rates for PCM signals (stereo, mono) from a digital
input are 32 kHz/44.1 kHz/48 kHz/88.2 kHz/96 kHz/16 bit, 20 bit, 24 bit.
