| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable selection of media with only one apparatus to improve application flexibility of a user by giving the predetermined commands to two selecting means and two attenuation regulating means to control the operation of respective means. SOLUTION: When a first manipulating means 11 is on and a second manipulating means 12 is on, first and second amplifying means 18, 21 are under the standby reset condition, attenuation amount for the second amplifying means 21 is regulated large, a first speaker outputs a sound source 14a, while a second speaker is in an output-stop condition, and a headphone outputs the sound source 14b. When a first manipulating means 11 is on and a second manipulating means 12 is off, the first and second manipulating means 18, 21 are in the standby release condition, attenuation amount for the second amplifying means 21 is not regulated and the first and second speakers and headphone also output the second source 14a. Thereby, sound source can be selected simultaneously the common use of the apparatus can be attained.</p> |
