Pressable Input Device Control for Aftertouch Note-On Generation
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Solution Overview
Problem
Existing input devices fail to generate a note-on event when a strong operation is performed while an aftertouch effect is being applied, leading to missed sound generation instructions.
Innovation Solution
An input device with a sensor and control unit that detects pressing operations, sets a control state for aftertouch effect validity, and generates note-on events based on detection values during valid states, ensuring sound generation even during aftertouch application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the aftertouch effect is applied continuously when the pressing signal exceeds the threshold, then the aftertouch effect can be maintained smoothly, but the note-on event cannot be generated again during the aftertouch period even when strong operations are performed
Solution Approach 1:
The system dynamically switches between two operational modes: aftertouch effect application mode and note-on event generation mode. The control unit determines which mode to activate based on the current state, allowing the system to adapt its behavior depending on whether an aftertouch effect is currently being applied or not. This dynamic state management resolves the contradiction by ensuring that note-on events can be generated when needed while maintaining aftertouch effect continuity when appropriate.
2Stability of the object's composition
If the system prioritizes maintaining the aftertouch effect, then the aftertouch effect remains stable, but the system fails to respond to new strong operations that should trigger note-on events
Solution Approach 1:
The system changes the operational parameter (mode) based on the current state. When an aftertouch effect is being applied, the system is in aftertouch mode where note-on events are suppressed. When no aftertouch effect is active, the system switches to note-on mode where new operations trigger note-on events. This parameter change approach allows the system to maintain stability during aftertouch while remaining responsive to new operations when appropriate.
Data Source
AI summary
An input device includes: a detection unit configured to detect, based on a detection value obtained by detecting an operation on a pressable portion, a note-on operation and a note-off operation; and a control unit configured to set, based on at least the detection value, a control state to a valid state in which an application of an aftertouch effect is valid or an invalid state in which the application of the aftertouch effect is invalid. The control unit is configured to generate a note-on event or a note-off event based on the detected note-on operation or the note-off operation, and generate an aftertouch-on event based on a detection value output during the valid state. The control unit is configured to generate the note-on event even in a case in which the note-on operation is detected based on the detection value output during the valid state.