Sound Image Adjustment in Electronic Keyboards via Intensity Control
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Solution Overview
Problem
Electronic keyboards lack the ability to generate sound images similar to acoustic pianos, which are essential for providing a high-level musical performance experience.
Innovation Solution
A sound signal generation method and device that adjusts the sound image based on the intensity of key depression, using a tone generator and sound image adjuster to simulate the depth and width of sound similar to an acoustic piano, by altering the transmission network and processing sound signals to create a wider or narrower sound image depending on the intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tone generator outputs sound signals in electronic keyboards, then the instrument can produce musical pitches, but it cannot generate sound images similar to acoustic pianos
Solution Approach 1:
The patent divides the sound generation system into multiple independent components: a tone generator for producing pitch signals, a sound image adjuster for controlling spatial characteristics, and a speaker system. This segmentation allows each component to be optimized independently while working together to create piano-like sound images.
Solution Approach 2:
The patent introduces a sound image adjuster as an intermediary component between the tone generator and the speaker. This mediator processes the sound signals to add spatial characteristics, enabling the system to generate piano-like sound images without requiring the complex mechanical structure of an acoustic piano.
2Illumination intensity
If the soundboard vibrates strongly in acoustic pianos, then a wide sound is generated, but electronic keyboards lack this vibration mechanism
Solution Approach 1:
The patent implements dynamic control of sound image characteristics based on the intensity of key depression. The sound image adjuster modifies spatial parameters in real-time according to playing intensity, allowing the system to adapt its sound output to match the expressive requirements of different playing styles and musical contexts.
Solution Approach 2:
The patent changes spatial parameters of the sound signal to control sound image characteristics. By adjusting parameters such as stereo width, reverb amount, and spatial position based on playing intensity, the system can generate a wide sound for strong key depression and a narrower sound for gentle pressing, replicating acoustic piano behavior.
3Ease of operation
If key depression intensity varies in acoustic pianos, then soundboard vibration and sound width vary accordingly, but electronic keyboards cannot replicate this relationship
Solution Approach 1:
The patent implements a feedback mechanism where the sound image adjuster continuously monitors key depression intensity and adjusts spatial parameters accordingly. This closed-loop control ensures that the sound image characteristics consistently match the player's expressive intentions, providing both ease of operation and reliable performance sound quality.
Data Source
AI summary
A sound signal generation method includes receiving a pitch and an intensity, and generating a sound signal corresponding to the pitch such that a size of a sound image of the sound signal is adjusted in accordance with the intensity.