2D Key Matrix for Dynamic Repeat Section and Pitch Control
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Solution Overview
Problem
Conventional music performance apparatuses lack the ability to easily vary repeat patterns and musical scales, resulting in monotonous music with insufficient modulation and intonation.
Innovation Solution
The apparatus includes key switches arranged in a two-dimensional matrix, with an X-coordinate associated with tone generation timing and a Y-coordinate with tone pitch, allowing for intuitive setting of repeat sections and tone pitch ranges, enabling users to create complex music with enhanced variety and modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the same tone generating data of 16 beats are reproduced repetitively, then the music piece can be performed continuously, but the music becomes monotonous with insufficient variation and modulation
Solution Approach 1:
The patent implements dynamic variation by allowing users to select different repeat patterns (1st repeat, 2nd repeat, 3rd repeat, or no repeat) and adjust tone pitch ranges during performance. The system transitions from static repetitive reproduction to dynamic adaptive performance, enabling continuous play while maintaining musical interest through user-controlled variations in rhythm and pitch.
2Device complexity
If a musical scale is fixed in advance, then the apparatus structure is simple, but the musical scale cannot be varied at later time
Solution Approach 1:
The patent enables dynamic adjustment of tone pitch ranges through user selection on the apparatus interface. Users can modify the musical scale range during operation without changing the underlying fixed structure, achieving adaptability while maintaining structural simplicity. The system allows real-time variation of musical parameters through user interaction.
Solution Approach 2:
The patent implements parameter changes by allowing users to adjust tone pitch range and repeat pattern settings. The system modifies musical parameters such as pitch range and rhythm pattern based on user input, enabling the same apparatus to perform different musical styles and variations without structural modification.
3Ease of operation
If key switches are arranged in two dimensions with X-coordinate for timing and Y-coordinate for pitch, then user operation is intuitive and easy, but the apparatus complexity increases
Solution Approach 1:
The patent applies dimensionality change by arranging key switches in a two-dimensional matrix where the X-axis represents timing (beat numbers) and the Y-axis represents pitch (tone numbers). This dimensional arrangement provides intuitive spatial correspondence for users while enabling complex music creation capabilities. The matrix structure transforms one-dimensional sequential input into two-dimensional parallel control.
Data Source
AI summary
Plural key switches are arranged in two dimensions along X- and Y-coordinate axes, and an X-coordinate position of each of the key switches is associated with tone generation timing while a Y-coordinate position of each of the key switches is associated with a tone pitch. Storage section stores a music piece data set that includes tone generating data having data of tone pitches and tone generation timing associated with the key switches. In a repeat-section setting mode, a repeat-section setting section causes the plural key switches to function as setting operators and sets a repeat section of the music piece data set on the basis of the X-coordinate position of any operated one of the key switches. In reproduction of the stored music piece data set, a reproduction section repetitively reproduces the tone generating data of the music piece data set which are included in the set repeat section.