Musical Performance Volume Control via Posture Variation
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Solution Overview
Problem
Conventional musical sound control systems fail to provide natural volume control when simulating instruments that produce sound through friction, as they rely on acceleration detection, which does not correspond with the volume of uniform or retarded motion.
Innovation Solution
A storage medium with a program that acquires posture variations of a user's movement using sensors or cameras, sets volume parameters based on these variations, and outputs sound signals accordingly, allowing for natural volume control in simulations of instruments like bowed stringed instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If acceleration-based volume control is used, then the control system is simple to implement, but it cannot provide natural volume control for instruments that produce sound through friction
Solution Approach 1:
The patent changes the detection parameter from acceleration to posture variation. By detecting changes in the posture of the controller over time intervals and calculating variation amounts, the system accurately reflects the user's friction-based movements regardless of acceleration patterns, enabling natural volume control for bowed string instruments.
2Device complexity
If acceleration sensors are used for volume control, then the device complexity is low, but the measurement does not correspond with volume for uniform or retarded motion
Solution Approach 1:
The patent introduces posture variation as an intermediary measurement between the physical movement and volume control. Instead of directly using acceleration, the system measures posture changes over time intervals, which serves as a more accurate mediator for determining volume in friction-based instrument simulations.
3Reliability
If posture variation acquisition is implemented, then natural volume control is achieved, but the processing complexity increases
Solution Approach 1:
The patent performs preliminary calculations by pre-defining posture types and their corresponding variation amounts. The system calculates posture variations based on predetermined posture classifications, which simplifies the processing complexity while maintaining the accuracy of natural volume control.
Data Source
AI summary
Provided is a program for musical performance which causes a computer of a musical performance apparatus to function as a posture variation acquisition unit 101 for acquiring the posture variation of a controller 5 per frame based on the angular velocity with respect to the posture or movement of the controller 5, a volume parameter setting unit 102 for setting a volume parameter for deciding the volume according to the posture variation, and a sound signal output unit 106 for outputting a sound signal of the volume according to the volume parameter.