Musical Instrument Light Indicator Using Relative Volume Ratios
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Solution Overview
Problem
Existing electronic musical instruments face challenges in smoothly indicating volume levels without flickering and maintaining music following, especially when dealing with varying volume changes in audio data.
Innovation Solution
The system uses a processor to calculate a relative ratio of volume levels based on maximum and minimum values over a second period, combined with a moving average, to control the lighting of multiple emitters, ensuring smooth indication of volume changes without flickering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the volume level is displayed using a single display area with light emitters, then the information on volume can be intuitively caught, but flickering occurs when dealing with varying volume changes in audio data
Solution Approach 1:
The system performs preliminary calculations by obtaining maximum values at first period intervals and then calculating relative ratios based on these maximum values before controlling light emitter output. This preliminary processing of volume data prevents flickering by establishing stable reference points before actual display updates occur.
Solution Approach 2:
The light emitter control is made dynamic by using relative ratios calculated from moving maximum values rather than fixed threshold comparisons. The system adapts the display behavior based on the dynamic range of volume changes, allowing the indicator to respond appropriately to varying audio levels while maintaining stability.
2Measurement precision
If the light emission is controlled based on absolute volume values, then the volume level can be indicated directly, but music following capability deteriorates when volume levels fluctuate widely
Solution Approach 1:
The system changes the parameter basis for light emission control from absolute volume values to relative ratios. By calculating the ratio of current maximum volume to reference maximum volume, the system maintains measurement precision while adapting to different music genres and volume ranges, thereby preserving music following capability across diverse audio content.
3Speed
If the sampling period for volume detection is shortened to improve responsiveness, then music following improves, but flickering increases
Solution Approach 1:
The system performs preliminary maximum value calculations at regular intervals, storing these values as reference points. This preliminary action allows the system to use shorter sampling periods for detecting volume changes while preventing flicker by comparing against pre-calculated maximum values rather than raw instantaneous readings.
Solution Approach 2:
The system implements periodic maximum value calculations at defined first period intervals, creating a rhythmic sampling pattern. This periodic approach balances responsiveness with stability by systematically updating reference points at optimal intervals, preventing both flicker and loss of music following capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for seamless volume level indication, preventing flickering while maintaining music fidelity, even with fluctuating volume levels, by using a relative ratio and moving average to control light emitter activation.
Implementation Method 1
controls light emission of the light emitters based on a relative ratio
Data Source
AI summary
An indicator device includes a plurality of light emitters and at least one processor. The processor obtains, 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. The processor obtains, 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. The processor controls light emission of the light emitters based on a relative ratio of a predetermined first period maximum value among the first period maximum values. The relative ratio is based on the second period minimum value and the second period maximum value.