AUDIO: Press and hold the AUDIO switch for at least 0.5 seconds to access the audio menu on the LCD. The LCD indicates the function selected. Press and release AUDIO to toggle to the next function in sequence from VOLUME to BASS, TREBLE and then back to VOLUME.

If the AUDIO switch is left on any selection other than VOLUME, the function automatically reverts back to VOLUME after a period of approximately 2-3 seconds.

±: Pressing the AUDIO switch upward (+) raises the level for the currently selected AUDIO (volume, bass, or treble). Pressing the switch downward (-) lowers the level. The level is raised or lowered as long as the switch is held until the minimum or maximum level is reached.

See I and J in Premium Sound System → Receiver Operation: FLHTCSE2 → LCD Screen Examples: FLHTCSE2. The LCD displays a horizontal dashed line to indicate the level. In the center of the line is a single thin dash. When the level is at the center, the selected audio is at a mid-point of its range.