Lexus RX400h2006 Owner's Manual page 317

AUDIO
Vehicles with rear seat entertainment system —
The "DISC" button may also be used to operate a DVD player
when a disc is loaded in the DVD player. Pressing the "DISC"
button changes between the CD player and DVD player. When
the DVD player is in operation, "AUX" appears on the display.
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In the "TAPE" or "CD" mode, the applicable functions are
shown in the lowest part of the display. Push the switch
just below to turn on each function.
(b) Adjusting audio sounds
Your audio system can adjust tone and sound balance
or select the listening seat position.
How good an audio program sounds to you is largely
determined by the mix of the treble, mid−range, and bass
levels. In fact, different kinds of music and vocal programs
usually sound better with different mixes of treble, mid−range
and bass.