Signal Supply Device for Electronic Keyboard Acoustic Realism
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Solution Overview
Problem
Conventional electronic keyboard musical instruments fail to accurately reproduce the relationship between string striking sounds and keybed hitting sounds, which vary with key depression intensity and acceleration, resulting in an unrealistic acoustic piano playing experience.
Innovation Solution
A signal supply device that generates and adjusts first and second sound signals based on operation body and linked member information, utilizing a CPU and sound generator to control the timing and volume of string striking and keybed hitting sounds, mimicking the acoustic piano's sound production dynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electronic keyboard instruments control sound intensity only by key depression velocity, then the sound production is simplified, but the realism and acoustic accuracy deteriorate
Solution Approach 1:
The sound signal is segmented into multiple independent components: first sound signal (string striking sound) and second sound signal (keybed hitting sound). Each component is generated and adjusted separately based on different parameters (key depression velocity for first sound, key depression acceleration for second sound), allowing independent control of each acoustic element to achieve realistic acoustic accuracy without overwhelming system complexity.
Solution Approach 2:
The system dynamically adjusts the relationship between first and second sound signals based on real-time detection of key depression acceleration. The adjustor modifies sound production parameters (volume, timing) of the second sound signal in response to varying playing dynamics, enabling realistic reproduction of keybed hitting sounds that vary with playing intensity while maintaining flexible adaptability to different performance styles.
2Reliability
If keybed hitting sound is added to electronic keyboard instruments, then the realism of acoustic piano reproduction is improved, but the device complexity increases
Solution Approach 1:
The adjustor acts as an intermediary component that coordinates between the first sound signal generator and second sound signal generator. It receives key depression acceleration information and automatically adjusts the relationship between the two sound signals (volume balance, timing relationship), eliminating the need for complex manual configuration while achieving realistic acoustic piano reproduction with balanced keybed hitting sounds.
Solution Approach 2:
The system changes sound production parameters (volume, timing) of the second sound signal based on detected key depression acceleration. When acceleration exceeds a threshold, the adjustor modifies the second sound signal parameters to produce realistic keybed hitting sounds, while keeping the system simple by only activating these changes when physically justified by the playing dynamics.
3Adaptability or versatility
If the relationship between first sound signal and second sound signal is dynamically adjusted, then the performance expression capability is improved, but the control complexity increases
Solution Approach 1:
The system implements feedback by detecting key depression acceleration and using this information to automatically adjust the relationship between first and second sound signals. The adjustor continuously monitors playing dynamics and modifies sound production parameters in real-time, enabling rich performance expression capability with automatic adaptation to different playing styles without requiring complex manual control.
Data Source
AI summary
A signal supply device according to an embodiment of the present invention includes a generator configured to generate a first sound signal and a second sound signal in accordance with an instruction signal including operation body information corresponding to an operation input to an operation body and linked member information corresponding to a movement of a linked member linked with the operation body and an adjuster configured to adjust a relationship between the first sound signal and the second sound signal on the basis of the operation body information and the linked member information.