Sony STR-DA5700ES Operating Instructions Manual page 40

It is not necessary to connect all the cords. Connect cords according to the jacks of your equipment.
CD player
or
A
A Coaxial digital cord (not supplied)
B Audio cord (not supplied)
C Monaural audio cord (not supplied)
Note
Audio input signals from MULTI CHANNEL
INPUT jacks cannot be recorded.
40
US
Super Audio CD player
or
B A
or
B
B
Tip
All the digital audio jacks are compatible with
32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz and 96 kHz
sampling frequencies. The COAXIAL IN jacks are
also compatible with 192 kHz sampling frequency.
C