Automatic Music Arrangement Aligning Accompaniment with Melody Accents
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Solution Overview
Problem
Existing automatic accompaniment data creation techniques fail to harmonize with the rhythmic elements of original music pieces, leading to incongruence in accent positions between melody and accompaniment performances, making human playback difficult.
Innovation Solution
An automatic arrangement apparatus and method that adjusts the time positions of accompaniment notes to match the accent positions extracted from the original performance information, ensuring harmony with the rhythmic elements of the music piece.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If automatic accompaniment data is created by changing pitches of tones in existing accompaniment patterns according to chord progression, then the accompaniment can be automatically generated, but the accent positions of the original music piece are canceled out and the rhythmic harmony is lost
Solution Approach 1:
The system performs preliminary extraction of accent positions from the original melody before generating the accompaniment. By identifying and storing the accent position information in advance, the system ensures that the subsequent accompaniment generation process can preserve these critical rhythmic elements rather than losing them during automatic creation.
Solution Approach 2:
The system changes the parameter of accent position timing in the generated accompaniment to match the original melody's accent positions. By adjusting the temporal parameters of accompaniment notes to coincide with extracted accent positions, the system maintains rhythmic harmony while still enabling automatic generation.
2Ease of manufacture
If existing accompaniment patterns are used with pitch adjustments based on chord progression, then the accompaniment generation is simplified, but the rhythmic elements and accent positions of the original music piece are not harmonized
Solution Approach 1:
The system uses the extracted accent positions from the original melody as feedback to adjust the timing of accompaniment notes. This feedback mechanism ensures that the generated accompaniment continuously aligns with the rhythmic characteristics of the original piece, maintaining reliability of rhythmic harmony throughout the automatic generation process.
Solution Approach 2:
By performing accent position extraction as a preliminary step before accompaniment generation, the system prepares the rhythmic framework in advance. This preliminary action allows the subsequent generation process to proceed easily while ensuring rhythmic accuracy is maintained through the pre-established accent position guidelines.
3Productivity
If accompaniment data is automatically created without considering accent positions, then the automation speed is high, but the performance becomes difficult due to disagreement in accent positions between melody and accompaniment
Solution Approach 1:
The system performs preliminary extraction of accent positions from the melody before generating the accompaniment. This advance preparation of rhythmic reference points enables rapid automatic generation while ensuring the resulting accompaniment is harmonized with the original accent positions, making it easier for human players to perform.
Solution Approach 2:
The system efficiently adjusts the temporal parameters of accompaniment notes to align with extracted accent positions. By automatically modifying these timing parameters during the generation process, the system maintains both high productivity and ease of playback without requiring manual adjustment.
Data Source
AI summary
Arranged accompaniment data are created by: acquiring original performance information; extracting, from the acquired original performance information, one or more accent positions in a music piece represented by the acquired original performance information; acquiring existing accompaniment pattern data; and adjusting time positions of one or more accompaniment notes, which are to be generated on the basis of the acquired accompaniment pattern data, so as to coincide with the extracted one or more accent positions. In this way, it is possible to create accompaniment data matching accent positions (rhythmic elements) of the music piece represented by the original performance information and thereby automatically make a musical arrangement with respective characteristics of the existing accompaniment pattern data and original performance information remaining therein.