| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem where a driver sequentially switches with respect to predetermined keys 33 of a steering wheel remote controller 32 one by one, each time the key 33 is pushed down while circulating a music source in FM→AM→CD→MD→TV→FM, but some users do not uniformly use all of the music source, sometimes perform a biased usage, for example, only FM and CD, and in that case, much time is required for selecting a desired music source. Ž<P>SOLUTION: The number of times of use of each music source is counted (S49→S62) for the use of continuous 5 min. or more. When the music source having the count of 30 or more emerges (S63), the percentage of the number of counts of each music source with respect to the maximum number of counts is calculated (S65). When there exist two or more of the music source of 10% or more, the music source of 10% or less is removed (S64→S66) from a circulation switching of the key 33. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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