2003 Chevrolet Astro Owner's Manual - Page 168

Setting the Tone (Bassnreble) BASS: Press this knob lightly so it extends. Turn the knob to increase or to decrease bass. TREB (Treble): Press this knob lightly so it extends. Turn the knob to increase or to decrease treble. If a station is weak or noisy, you may want to decrease the treble. Return these knobs to their stored positions when you're not using them. Adjusting the Speakers (Balance/Fade) BAL (Balance): Press this knob lightly so it extends. Turn the knob to move the sound toward the right or the left speakers. FADE: Press this knob lightly so it extends. Turn the knob to move the sound toward the front or the rear speakers. Return these knobs to their stored positions when you're not using them. AUTO TONE (Automatic Tone): Press this knob to choose bass and treble equalization settings designed for country/western, jazz, talk, pop, rockand classical stations. To return thebass and treble to manual mode, either the press and release the AUTOTONE button until the display goes blank or press and release the BASS or TREB knobs and turn them until the display goes blank. Playing a Compact Disc Insert a disc partway into the slot, label side up. The player will pull it in. Wait a few seconds and the disc should play. CD and a CD symbol will also appear on the display. Anytime you are playing a CD, the letters CD will be next to the CD symbol. If an error appears on the display, see "Compact Disc Messages'' later in this section. 3-43