Electronic Keyboard Key-Release Control for Sound Switching

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Solution Overview

Problem

Existing electronic instruments require users to operate buttons at the precise timing of sound generation to switch musical sounds, deteriorating operability.

Innovation Solution

An electronic instrument with a keyboard that performs a key release AT process by detecting key positions deeper than the sound generation start position, allowing for easy switching between normal and special musical sounds through key release.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If users operate buttons to switch musical sounds at the timing of sound generation end, then musical sound control is achieved, but operability deteriorates

Engineering Contradiction:

ImproveoperabilityVSAvoidtiming precision requirement

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The patent inverts the traditional timing of sound switching from 'at the end of sound generation' to 'at the key release moment'. By detecting key release through the key release detection unit and triggering sound switching at this moment, the system eliminates the need for precise timing during sound generation, thereby improving operability

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The key release detection unit performs preliminary detection of the key release state before the sound switching is executed. The control unit prepares the sound switching in advance based on the detected key release, allowing the transition to occur smoothly without requiring precise timing intervention from the user

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If key release AT process is implemented, then musical sound control capability is improved, but device complexity increases

Engineering Contradiction:

Improvemusical sound control capabilityVSAvoidstructure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The key release detection unit utilizes the existing key input detection mechanism to serve dual purposes: detecting both key press events for normal sound generation and key release events for AT process triggering. This multi-functionality approach adds the key release detection capability without requiring a completely separate detection system, thereby limiting the increase in device complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The control unit acts as an intermediary that receives detection results from the key input detection unit and determines whether to trigger the AT process or normal sound generation. This intermediary role allows the system to manage the complexity by centralizing the decision-making logic in the control unit rather than distributing it across multiple specialized components

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20260024515A1Electronic instrument, musical sound output method, and non-transitory computer readable medium

Publication Date: 2026.01.22 ROLAND CORP

AI summary

An electronic instrument including a keyboard having multiple keys. The electronic instrument includes: a normal musical sound generation device, configured to generate a normal musical sound in a case where a position of the key reaches a sound generation start position after the key is pressed; and a key release processing device, configured to perform a key release AT process, which is a predetermined musical sound control process at a time of key release of the key, in a case where the position of the key reaches an AT detection position as a position deeper than the sound generation start position through further pressing the key after the position of the key reaches the sound generation start position.