Automatic Music Composition Apparatus for Motif-Refrain Contrast
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Solution Overview
Problem
Existing music composition technologies struggle to generate melodies that naturally contrast between motifs and refrains, often resulting in unnatural or uncreative outputs due to independent creative intentions, and are not user-friendly for beginners.
Innovation Solution
An automatic composition apparatus that includes a processing unit for receiving a motif, retrieving a phrase set from a database, and generating a melody based on matching levels, using a chord progression selecting unit, a melody generating unit, and a phrase set database to create harmonious and contrasting melodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If refrain melodies are automatically generated based on motifs by constraint like in the related art technologies, then the generation process is automated, but the resulting melodies are unnatural and lack general meaning
Solution Approach 1:
The patent uses a database of pre-collected refrain melody patterns that have been extracted from actual music作品中. Instead of generating melodies through constraint-based algorithms, the system copies and selects from authentic refrain patterns that naturally contrast with motifs, thereby maintaining both automation and naturalness.
Solution Approach 2:
The system changes the approach from algorithmic generation to statistical selection based on matching degrees. By evaluating multiple candidate refrains against the motif using similarity metrics and selecting those with appropriate contrast, the system achieves natural-sounding results while remaining automated.
2Adaptability or versatility
If both motif and refrain melody are input to automatically generate music, then comprehensive control over composition is achieved, but the input method becomes complicated and not user-friendly for beginners
Solution Approach 1:
The patent extracts only the essential input element (motif) from the composition process, removing the need for users to input refrain melodies. The system automatically handles refrain generation by selecting from its database, thereby maintaining compositional control while dramatically simplifying the user interface for beginners.
Solution Approach 2:
The system performs the refrains melody generation task automatically based on the input motif, making the system self-sufficient for completing the composition. Users only need to provide the motif, and the system independently handles the complex task of generating contrasting refrains, eliminating the need for complicated dual-input methods.
3Adaptability or versatility
If motif melodies and refrain melodies are treated as having independent creative intentions, then creative freedom is maintained, but the contrast between them becomes unnatural
Solution Approach 1:
The system evaluates candidate refrain melodies by calculating their matching degree against the input motif and selects those with appropriate contrast. This feedback mechanism ensures that generated refrains naturally complement the motif while maintaining the independence of their creative identities, achieving both creative freedom and natural contrast.
Data Source
AI summary
An automatic composition apparatus includes a processing unit. The processing unit performs a receiving process of receiving a phrase including a plurality of note data items as a received motif and receiving a type of the phrase, a retrieving process of retrieving a phrase set from a phrase set database and a melody generating process of generating a melody based on the retrieved phrase set. The phrase set includes phrases having the same type as the received type and having relatively high matching levels for the received motif. The phrase set database stores a plurality of phrase sets each of which is a combination of a plurality of phrases of different types.