Fiio X5 User Manual page 17

b) Audio settings—lowpass filter mode
To set the filter modes: Sharp Roll-Off Filter, Slow Roll-Off Filter, Short delay Sharp Roll-Off Filter, Short
delay Slow Roll-Off Filter, Super Slow Roll-Off Filter
c) Audio settings—Multifunctional Output
The 3.5mm output port at the bottom right of the X5 may output analog line signal or coaxial digital
S/PDIF signals. This menu item lets you choose between the two.
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