Electronic Musical Instrument Power-Hold Feedback for State Switching
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Solution Overview
Problem
Users of electronic musical instruments face difficulty in determining the exact duration required to hold down the power button to switch between normal, standby, and stop states, leading to potential unintended actions due to unclear notification of the remaining time before entering the stop state.
Innovation Solution
The electronic musical instrument incorporates a processor that performs different processes based on the duration of input operations, using a display and light emitters to notify the user whether the input operation has reached a reference time, thereby facilitating clear selection of the desired state transition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the power button operation duration is used to differentiate between standby and stop states, then the operation interface is simplified, but it becomes difficult for users to determine the exact duration required, leading to unintended actions
Solution Approach 1:
The notification device provides real-time feedback to the user during the power button press operation, displaying the current duration and notifying when a reference duration has been reached. This feedback mechanism allows users to understand exactly how long they need to hold the button to achieve the desired state transition, preventing unintended actions while maintaining interface simplicity.
Solution Approach 2:
The system performs preliminary notification before the state transition occurs. By notifying the user in advance when the reference duration has been reached and what state will be triggered, the system allows users to adjust their operation if needed, ensuring intentional state transitions while keeping the operation interface simple.
2Adaptability or versatility
If different processes are performed based on input operation duration, then functional versatility is improved, but operation clarity deteriorates due to unclear timing requirements
Solution Approach 1:
The notification device continuously provides feedback during the power button press, showing the current duration and notifying when reference durations are reached. This clarity feedback mechanism helps users understand the timing requirements for different state transitions (standby vs. stop), making the multi-functional system easy to operate.
Solution Approach 2:
The notification device uses different notification contents or visual states to indicate different duration thresholds. This visual differentiation helps users understand which duration range will trigger which state transition, improving operation clarity while maintaining functional versatility.
Data Source
AI summary
An electronic musical instrument includes an input device that receives an input operation, a display, and a processor. The processor performs a first process upon duration of a detected continuation of the input operation being a reference time or longer. The processor performs a second process upon duration of a detected continuation of the input operation being less than the reference time. The processor causes the display to display a content from which it is determinable whether or not duration of a detected continuation of the input operation being the reference time or longer.