2010 Toyota Sienna Navigation Manual - Page 192

AUDIO/VIDEO SYSTEM (d) DSP control You can turn on/off the surround function and the automatic sound levelizer. 1. Push the "AUDIO" button. 3. Touch the desired button. "TREB" "+" or "-": Adjusts high−pitched tones. "MID" "+" or "-": Adjusts mid−pitched tones. "BASS" "+" or "-": Adjusts low−pitched tones. "FRONT" or "REAR": Adjusts sound balance between the front and rear speakers. "L" or "R": Adjusts sound balance between the left and right speakers. 4. Touch "OK". The tone of each mode (for such as AM, FM1 and CD changer) can be adjusted. 2. Touch "DSP". Surround function: Select "ON" of "SURROUND" and touch "OK". The surround function will turn on. Automatic sound levelizer (ASL): When the audio sound becomes difficult to be heard due to road noise, wind noise or other noises while driving, the system adjusts to the optimum volume according to the noise level. Select "ON" of "ASL" and touch "OK". 193