Indicator device, electronic musical instrument, light emission control method and storage medium

A light emission control method that is performed by a computer, comprising:

• obtaining, at intervals of a first period, a first period maximum value representing a maximum volume among a plurality of pieces of volume information based on an input signal,
• obtaining, for each second period including a plurality of first periods each being the first period, a minimum value among first period maximum values each being the first period maximum value as a second period minimum value and a maximum value among the first period maximum values as a second period maximum value, and
• controlling light emission of a plurality of light emitters based on a relative ratio of a predetermined first period maximum value among the first period maximum values, the relative ratio being based on the second period minimum value and the second period maximum value.

A non-transitory computer-readable storage medium storing a program that causes a computer to:

• obtain, at intervals of a first period, a first period maximum value representing a maximum volume among a plurality of pieces of volume information based on an input signal,
• obtain, for each second period including a plurality of first periods each being the first period, a minimum value among first period maximum values each being the first period maximum value as a second period minimum value and a maximum value among the first period maximum values as a second period maximum value, and
• control light emission of a plurality of light emitters based on a relative ratio of a predetermined first period maximum value among the first period maximum values, the relative ratio being based on the second period minimum value and the second period maximum value.