Electronic Keyboard Sound Switching by Key Speed and Depth
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Solution Overview
Problem
Existing electronic musical instruments cannot generate only the second playing technique sound when transitioning from the first to the second key depression depth range, leading to user inconvenience.
Innovation Solution
An electronic musical instrument that generates a normal musical sound upon reaching a sound generation start position and a special musical sound when the key speed equals or drops below a threshold before reaching that position, allowing independent generation of different sounds based on key position and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the key depression depth is switched between first range Q1 and second range Q2 to generate different playing technique sounds, then multiple timbres can be output through a single key operation, but the first playing technique sound is generated prior to the second playing technique sound causing the user to be unable to generate only the second playing technique sound
Solution Approach 1:
The patent applies dynamics by making the sound generation condition changeable based on key depression speed. Instead of fixed depth ranges, the system dynamically determines whether to generate the first or second playing technique sound based on the speed at which the key is depressed, allowing users to independently select different timbres by controlling key depression speed rather than dealing with sequential depth range transitions
2Adaptability or versatility
If the key depression depth transitions from first range Q1 to second range Q2, then different playing technique sounds can be generated, but the transition causes the first playing technique sound to be generated before the second playing technique sound
Solution Approach 1:
The patent applies preliminary action by determining the key depression speed during the key depression process itself, before the key reaches its final position. This allows the system to pre-determine which sound should be generated based on the depression speed measured during the action, avoiding the sequential generation problem where the first sound plays before the second sound can be triggered
3Device complexity
If a single key is used to generate multiple timbres through depth range switching, then keyboard complexity is reduced, but the user cannot independently generate different sounds without simultaneous previous sound generation
Solution Approach 1:
The patent applies parameter changes by using key depression speed as the determining parameter for sound selection instead of fixed depth ranges. This allows a single key to independently generate different playing technique sounds based on the speed parameter, maintaining simple keyboard structure while enabling precise control over which sound is generated without simultaneous previous sound generation
Data Source
AI summary
Provided are an electronic musical instrument, a musical sound output method, and a musical sound output program capable of independently generating different musical sounds, that is, a normal musical sound and a special musical sound, through an operation on a single key. In a case where the position of a key becomes equal to or lower than a sound generation start position while the speed of the key is maintained higher than a speed threshold value, the normal musical sound of the key is generated while the special musical sound is not generated. In a case where the speed becomes equal to or lower than the speed threshold value before the position of the key reaches the sound generation start position, the special musical sound of the is generated while the normal musical sound is not generated.