Keyboard Damper Half-Point Recording for Key-Specific Reproduction
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Solution Overview
Problem
Existing keyboard musical instruments struggle to accurately record and reproduce the half pedal and key-damper operations due to variations in pedal and key-specific characteristics, leading to inconsistencies in automatic performances.
Innovation Solution
A keyboard musical instrument equipped with sensors and data processing systems that identify and record key-specific and pedal-specific half regions and points, allowing for the generation and recording of performance data that corresponds to individual damper characteristics, enabling precise reproduction of string-releasing and string-contacting movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single predetermined half point is used for all keys, then the recording system is simple, but the reproduction accuracy of key-specific damper characteristics deteriorates
Solution Approach 1:
The patent divides the single half point concept into multiple key-specific half points. Each key has its own predetermined half point value stored in the storage unit, allowing the system to account for variations in damper characteristics across different keys while maintaining a relatively simple overall system structure.
Solution Approach 2:
The patent applies local quality by assigning different half point values to different keys based on their specific damper characteristics. This allows each key to have customized parameters that reflect its local characteristics, improving reproduction accuracy without requiring a completely complex system redesign.
2Measurement precision
If key-specific half points are recorded for each key, then the reproduction accuracy of damper characteristics is improved, but the device complexity increases
Solution Approach 1:
The system segments the half point data into key-specific values stored in a structured manner in the storage unit. This segmentation allows for improved accuracy while keeping the data management organized and the system architecture manageable.
Solution Approach 2:
The patent uses predetermined half point values that are copied from the storage unit during performance reproduction. This copying mechanism allows the system to reuse the same key-specific parameters across multiple performances without requiring complex real-time calculations, thereby limiting the increase in device complexity.
3Ease of manufacture
If conventional single half point recording is used, then the recording method is simple, but the reproducibility of automatic performances deteriorates
Solution Approach 1:
The patent segments the recording data into key-specific half point information, which is stored and retrieved during automatic performance reproduction. This segmentation improves reproducibility by capturing the nuanced differences in damper characteristics across keys.
Solution Approach 2:
By recording and reproducing key-specific half point values, the system applies local quality to match the original performance characteristics more accurately. This allows automatic performances to faithfully reproduce the intended damper effects for each key while maintaining a relatively simple recording methodology.
Data Source
AI summary
Dampers provided in corresponding relation to a plurality of keys are each controlled in response to both an operation of a pedal and an operation of the corresponding key. One half region or half point is determined based on a plurality of half pedal regions or half pedal points, in a stroke of the pedal, specific to the individual dampers. Performance data instructing a pedal operation is generated and recorded on the basis of a stroke position detected in response to a pedal operation and the determined one half region or half point. For each of the keys, a key-damper half region or key-damper half point in a stroke of the key is identified in advance. Performance data instructing key operations is generated and recorded on the basis of the key-damper half regions or key-damper half points specific to the keys and stroke positions detected in response to key operations.