Musical Note Repetition Detection Using Key and Pedal Events
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Solution Overview
Problem
Existing systems fail to accurately determine repetition of the same note in acoustic keyboard instruments, particularly when considering both key operations and pedal states.
Innovation Solution
A repetition determination device that includes a processor to analyze note-on and note-off events, along with pedal-on and pedal-off events, to determine whether a second note-on event corresponds to the repetition of a first note-on event, and applies a prescribed sound control based on these events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If repetition determination is based only on key operations, then the determination process is simple, but the accuracy of repetition determination deteriorates when pedal operations are involved
Solution Approach 1:
The patent combines key operation information (note-on/note-off events) with pedal operation information (pedal-on/pedal-off events) into a unified repetition determination process. The electronic controller integrates both types of events to comprehensively judge whether a note is a repetition, ensuring accurate detection even when pedals are used. This merging approach resolves the contradiction by maintaining determination simplicity while improving accuracy through multi-source information integration.
2Measurement precision
If the system considers both key operations and pedal states for repetition determination, then the accuracy of repetition determination improves, but the device complexity increases
Solution Approach 1:
The electronic controller is designed with multi-functionality to handle both key operation events and pedal operation events through a single integrated determination mechanism. The controller universally processes different types of musical input events (note-on, note-off, pedal-on, pedal-off) using the same repetition determination logic, which improves accuracy without proportionally increasing system complexity. This universal approach allows the system to adapt to various playing techniques while maintaining architectural simplicity.
Data Source
AI summary
A repetition determination device includes an electronic controller including at least one processor configured to execute a first acquisition unit configured to acquire note-on events and a note-off event as note events corresponding to key operations, a second acquisition unit configured to acquire a pedal-on event and a pedal-off event as pedal events corresponding to operations of a pedal having a function of sustaining sound, and a determination unit configured to determine, based on a time interval between acquisition of a first note-on event and acquisition of a second note-on event, the note-off event, the pedal-on event, and the pedal-off event, whether the second note-on event corresponds to repetition of the same note with respect to the first note-on event. The first note-on event and the second note-on event are successive and related to the same note among the note-on events that have been acquired.