2010 Toyota Yaris Owners Manual - Page 611

3 -2 . U sing t he a udio syst e m Opt im a l use of t he a udio syst e m Type A Displays the current mode Changes the following setting Sound quality and volume balance (→P. 195) The sound quality and balance setting can be changed to produce the best sound. Type B Using the AUDIO CONTROL function n Changing sound quality modes Pressing following order. BAS → TRE → FAD → BAL → ASL* *: Type B only or selects the mode to be changed in the 194