| 摘要 |
PURPOSE:To obtain the same audio sense as the case when the sound is listened to by a loudspeaker without readjusting it manually, in the case an effect of tone control, an echo sound and a reverberation sound is listened to by changing the loudspeaker to a headphone. CONSTITUTION:Based on detecting information of an insertion detection switch SW2 for detecting a fact that a plug is inserted into a headphone jack 7, in the case the plug is inserted, a pre-amplifier tone control part 2 is controlled so that a control part 9 executes actual tone control by data brought closer to a prescribed ratio standard value than an operation value set by a user. |
