A method for flattening power of a musical sound signal, said method being characterized by comprising: determining second values corresponding to respective first values indicating power at a plurality of time points of a musical sound signal each on the basis of the result of a comparison between the present value of the first value and the present value of the second value; and flattening the plurality of first values using the second values corresponding to the plurality of first values, respectively, wherein the second value changes while drawing a predetermined trajectory when, in the result of the comparison, a state where the present value of the second value is larger than the present value of the first value continues.

There is provided a method for a computer to perform evaluating rapid chord playing and/or tonality based on performance actions of a performance; and instructing, during the performance, an outputter to output a reaction sound corresponding to the evaluation.

A beat timing generation device including a generation unit for generating, from data of music that has been input, information of timings on which a beat of the music depends and a plurality of pieces of intensity data indicating a power at the timings; a calculation unit for calculating a period and a phase of the beat of the music using the plurality of pieces of intensity data; and a detection unit for detecting a beat generation timing on a basis of the period and the phase of the beat.

A beat timing generation device including a generation unit for generating, from data of music that has been input, information of timings on which a beat of the music depends and a plurality of pieces of intensity data indicating a power at the timings; a calculation unit for calculating a period and a phase of the beat of the music using the plurality of pieces of intensity data; and a detection unit for detecting a beat generation timing on a basis of the period and the phase of the beat.

A portable lightweight cheering apparatus integrated with a collapsible tubular frame chair. The apparatus comprises sound recordings, electronic equipment to store the sound recordings, and devices to convert the recordings to sounds reproduced by built-in speakers A push of any one of momentary pushbutton switches disposed on the chair armrest sides will cause a recording sound to emanate from the speakers; a tap on any one of momentary pad switches will cause a recorded drum sound to emanate from the speakers enabling a user to be a virtual drummer and a virtual cheering group.

An audio output device and associated output method produce sound effects that are more natural to a listener are given to a piece of music. A mode is selected from a plurality of modes, and first sound source data and second sound source data are respectively outputted as the sound effects with music data at an output level that is determined based on the mode selected by a mode selection unit.