Fiio K3 - Scene 3: Connect to Amplifier with Coaxial Input

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Scene 3: Connect to the amplifier with coaxial input
note：
 The coaxial output supports up to 192k sampling rate and DOP
output of DSD64. If the device does not support, please adjust the
audio output settings of the PC player;
 Power/volume knob adjustment is invalid to the coaxial output
volume.