Stick-Type Performance Apparatus Using 3D Spatial Tone Mapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic musical instruments with stick-type members, such as those using acceleration and geomagnetic sensors, face challenges in allowing players to easily change musical tone elements, including tone colors, as they often require specific movements and orientations, making it difficult to generate desired tones as the number of tone colors increases.
Innovation Solution
A performance apparatus with a holding member equipped with a space/parameter storing unit, position-information obtaining unit, holding-member detecting unit, reading unit, and instructing unit, which defines imaginary sound generation spaces and associates them with specific tone parameters, allowing the player to generate musical tones by moving the holding member within these spaces and selecting the corresponding tone parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple tone colors are generated based on swing direction using geomagnetic sensor, then tone color variety increases, but the angle range for each tone color becomes narrower and operation becomes more difficult
Solution Approach 1:
The patent transitions from two-dimensional swing direction detection (using geomagnetic sensor alone) to three-dimensional position detection by combining acceleration sensor data with geomagnetic sensor data. This dimensional expansion allows the system to define sound generation spaces as volumetric regions rather than angular sectors, providing broader and more intuitive control areas for each tone color while maintaining variety.
Solution Approach 2:
The patent divides the three-dimensional space around the performance apparatus into multiple discrete sound generation spaces, each associated with specific tone colors. This segmentation allows players to select different tone colors by moving to different spatial regions, providing both variety and ease of control through clear spatial boundaries.
2Ease of operation
If simple acceleration sensor control is used, then operation is simple, but tone color variety and control flexibility are limited
Solution Approach 1:
The patent merges the functions of the acceleration sensor (for detecting swing intensity and timing) with the geomagnetic sensor (for detecting swing direction and position). This combination allows the system to maintain simple swing-based operation while enabling rich tone color variety through the integrated analysis of both sensor data streams.
Solution Approach 2:
By adding the spatial dimension from geomagnetic data to the temporal/intensity dimension from acceleration data, the system expands from simple threshold-based triggering to sophisticated three-dimensional space-based tone selection, maintaining operational simplicity while dramatically increasing versatility.
Data Source
AI summary
A performance apparatus 11 extends in its longitudinal direction to be held by a player with his or her hand. The performance apparatus 11 is provided with a geomagnetic sensor 22 and an acceleration sensor 23. At the time when the geomagnetic sensor and acceleration sensor determine that the performance apparatus 11 is kept within a sound generation space and has been moved by the player, CPU 21 gives an electronic musical instrument 19 an instruction to generate a musical tone of a tone color corresponding to the sound generation space. The sound generation spaces and corresponding tone colors are stored in a space/tone color table in RAM 26. Upon receipt of the instruction, the electronic musical instrument generates a musical tone of a tone color corresponding to the sound generation space.