Musical Performance Pitch Correction Using Playing-Position Estimation
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Solution Overview
Problem
Existing techniques for correcting pitches in musical performance, such as those described in Patent Literature 1, fail to accurately adjust pitches when the player's playing position deviates from the composition's playback position, and cannot correct pitches to appropriate notes if they are outside chord notes.
Innovation Solution
A musical performance correction method and device that estimate the playing position in a musical composition by analyzing musical performance data and correct the played pitch to a reference pitch within a predetermined value of the estimated position, using a pitch correction unit to adjust pitches to appropriate reference pitches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pitch correction is performed based on fixed playback position in musical composition, then pitch correction can be implemented systematically, but pitch correction accuracy deteriorates when player's playing position deviates from playback position
Solution Approach 1:
The patent applies dynamics by transitioning from a static playback position-based correction system to a dynamic playing position estimation system. The musical performance analysis unit continuously estimates the player's actual playing position based on analyzed performance data, allowing the pitch correction to adapt dynamically to the player's tempo and rhythm variations rather than relying on fixed temporal positions from the musical composition data.
Solution Approach 2:
The patent implements feedback by using the musical performance analysis unit to analyze the player's actual performance and estimate playing position, then using this estimated position as feedback to guide the pitch correction process. This closed-loop approach allows the system to continuously adjust corrections based on the player's actual playing position, improving accuracy while maintaining systematic implementation.
2Device complexity
If pitch correction is limited to chord notes only, then correction process is simplified, but pitch correction applicability deteriorates when composition includes non-chord notes
Solution Approach 1:
The patent applies universality by extending the pitch correction functionality from chord notes only to all types of notes including non-chord notes. The pitch correction unit is designed to correct any played pitch to the nearest appropriate reference pitch from the musical composition data, regardless of whether the note is a chord note or non-chord note, making the system universally applicable to all note types in the composition.
Solution Approach 2:
The patent applies parameter changes by modifying the selection criteria for target pitches. Instead of restricting correction targets to chord notes only, the system changes the parameter to select the nearest reference pitch from all available notes in the musical composition data, including non-chord notes. This parameter change expands the correction applicability while maintaining a relatively simple correction process.
Data Source
AI summary
A musical performance correction method executable by a computer, the musical performance correction method includes: estimating a playing position in a musical composition by analyzing musical performance data indicating a played pitch played by a user; and correcting the played pitch indicated by the musical performance data to a reference pitch, from among a plurality of reference pitches corresponding to the playing position in the musical composition, in a case where a difference between the played pitch and the reference pitch is less than a predetermined value.