Patent ID: 8618403

Claim:
A tone control apparatus, comprising: a volume adjusting section for adjusting a volume level of an audio signal to a volume level set by a control section; a boost processing section for executing a boost process so that a boost band of the audio signal has a boost value set by the control section; an amplifying section for amplifying the audio signal via the volume adjusting section and the boost processing section; a detecting section for detecting whether the audio signal output from the amplifying section has a first set value or more, and when the audio signal has the first set value or more, outputting a signal representing that the audio signal has the first set value or more to the control section; and the control section for, when receiving the signal representing that the audio signal has the first set value or more from the detecting section, determining whether the set boost value is a predetermined value or more, and when the set boost value is the predetermined value or more, reducing the currently set boost value by a predetermined step so as to set a new boost value, and when the set boost value is less than the predetermined value, reducing the currently set volume level by a predetermined step so as to set a new volume level.