Selective Chord Conversion for Playability Without Tonal Loss
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Solution Overview
Problem
Existing techniques for converting chords in a musical piece fail to maintain the musical impression, as all chords are converted without considering their importance in tonality or similarity, leading to a loss of musical coherence.
Innovation Solution
A method and device that convert chords only if they satisfy specific conditions related to tonality and similarity, preserving musical impression by converting difficult chords into easier alternatives while maintaining tonal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If all particular chords are converted using the chord conversion table, then the number of difficult chords is reduced, but the musical impression is not maintained
Solution Approach 1:
The patent applies local quality by treating different chords differently based on their specific characteristics. Instead of uniformly converting all chords, the system evaluates each chord's importance to tonality and musical function, converting only those that are both difficult to play and non-critical to the musical impression. This selective approach preserves the musical integrity while improving playability where appropriate.
Solution Approach 2:
The patent changes the parameters of chord conversion by introducing multiple evaluation criteria (tonality importance, chord difficulty, similarity metrics) rather than simple binary conversion. The system adjusts conversion decisions based on these parameter evaluations, transforming the rigid all-or-nothing conversion approach into a nuanced, condition-based selection process that balances playability and musical fidelity.
2Device complexity
If chords are converted without considering tonality and similarity, then conversion process is simplified, but musical coherence is lost
Solution Approach 1:
The patent applies preliminary action by pre-establishing evaluation criteria and conversion rules before the actual chord conversion process. The system pre-defines tonality importance levels, chord difficulty thresholds, and similarity metrics, allowing the conversion process to proceed systematically without ad-hoc decisions. This preliminary preparation maintains musical coherence while keeping the execution process manageable.
Solution Approach 2:
The patent implements feedback mechanisms by continuously evaluating whether converted chords maintain the original musical impression. The system compares converted chords against the original composition's tonal characteristics and musical function, using this feedback to adjust conversion decisions. This feedback loop ensures musical coherence is preserved while allowing flexible conversion of difficult chords.
Data Source
AI summary
A chord processing device includes a memory storing instructions, and a processor configured to implement the stored instructions to execute a plurality of tasks, including: a receiving task that receives a first chord consisting of plural notes, an analysis task that determines whether the first chord c is a subject chord, and a converting task that, in a case where the analysis task determines that the first chord is the subject chord, converts the first chord into a second chord that relates to the first chord a case where the first chord satisfies a prescribed chord-related condition relating to the first and second chords, while not converting the first chord in a case where the first chord does not satisfy the prescribed chord-related condition.