From the manual:
13. DIGITAL INPUT JACK (OPTICAL)
16 – 24 Bit, 44.1 kHz - 192 kHz digital data Input. MQA nor DSD files can be inputted.
14. DIGITAL INPUT JACK (COAXIAL 1)
16 – 24 Bit, 44.1 kHz - 192 kHz digital data Input. MQA nor DSD files can be inputted.
15. DIGITAL INPUT JACK (COAXIAL 2)
16 – 24 Bit, 44.1 kHz - 192 kHz digital data Input. MQA nor DSD files can be inputted.
16. DIGITAL INPUT JACK (AES/EBU)
16 – 24 Bit, 44.1 kHz - 192 kHz digital data Input. MQA nor DSD files can be inputted.