21. AIR AMP volume knob indicator light description

Both the menu knob and the volume knob have indicator lights. The two indicator lights are completely synchronized, with the same brightness, color, and breathing effect. You can adjust the brightness level or turn off the indicator lights through the "RGb-b" option in the settings menu. You can also switch between different colors, breathing states, etc. through the FiiO Control app settings menu.

Under default settings, the indicator light color represents the sampling rate of the currently received audio data:

Bluetooth format indicator light color description

SBC: blue light

LDAC: white light

USB, optical, coaxial, streaming, and local playback indicator light color description

Sampling rate of 48k and below: blue

Sampling rate above 48k: yellow

DSD: green

In LINE mode, the indicator light is cyan blue.

Note: In USB decoding mode, when playing MQA, the indicator light will display different colors according to different MQA formats.