Fiio X7 Mark II User Manual page 20

the coaixal device connecting with the DAP needs to support DSD. It can only support up to DSD64
signal when SPDIF Out, higher specs format like DSD 128 is not supported.
f) Audio settings—Gain
Sets the gain level of the headphone output to be either High (high volume) or Low (low volume).
g) Audio settings—Channel balance
Sets the volume balance between the left and right channels. From being biased leftmost (L10)
through centred (0) to rightmost (R10), there are 21 settings available.
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