2009 Toyota Yaris Owners Manual - Page 243

3-2. Using the audio system n Adjusting the Automatic Sound Levelizer (ASL) When "ASL" is selected, turning to the right changes the "ASL level in the order of the "LOW", "MID" and "HIGH". Turning to the left turns "ASL" off. ASL automatically adjusts the volume and tone quality according to the vehicle speed. n Trademark owned by SRS Labs, Inc. The audio system utilizes SRS FOCUS® and SRS TruBass® audio enhancement technologies, under license from SRS Labs, Inc., in all modes except AM radio mode. FOCUS, TruBass, SRS and symbols are trademarks of SRS Labs, Inc. FOCUS and TruBass technologies are incorporated under license from SRS Labs, Inc. 208