Automatic Musical Performance Device Accompaniment Adaptation
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Solution Overview
Problem
Existing automatic musical performance devices require complex user input for selecting accompaniment data, leading to unwanted changes in chord progressions and rhythms during solo performances or drum-based musical compositions.
Innovation Solution
An automatic musical performance device with a synthesizer that uses a keyboard and user evaluation buttons to estimate and output accompaniment sounds and effects based on performer input, prioritizing patterns with high user evaluation and maintaining consistent rhythms and chords through setting keys for accompaniment, rhythm, and pitch changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If automatic accompaniment data is selected from a displayed list after inputting a rhythm pattern, then automatic accompaniment can be provided, but the selection operation becomes complicated
Solution Approach 1:
The system automatically analyzes the input rhythm pattern and selects appropriate automatic accompaniment data without requiring the user to manually search or select from a list. The device serves itself by autonomously matching the input pattern with suitable accompaniment data from the database, thereby eliminating complex selection operations while maintaining adaptability.
Solution Approach 2:
The system pre-processes and stores multiple pieces of automatic accompaniment data in a database with associated rhythm patterns before user input. When the user inputs a rhythm pattern, the system has already prepared the accompaniment data for rapid automatic matching and selection, avoiding the need for real-time manual selection from a displayed list.
2Adaptability or versatility
If automatic musical performance changes based on performer input, then the system responds to musical performance, but unwanted changes occur in chord progressions and rhythms during solo performances or drum-based compositions
Solution Approach 1:
The system applies different processing rules to different elements of the musical performance. For solo performances and drum-based compositions, the system maintains stable chord progressions and rhythms by detecting these specific performance types and applying appropriate constraints, while allowing automatic accompaniment changes for other performance types where such changes are desirable.
Solution Approach 2:
The system dynamically adjusts its behavior based on the type of performance detected. When solo or drum-based performances are identified, the system locks certain parameters (chord progressions and rhythms) to maintain stability. For other performance types, the system allows dynamic changes in automatic accompaniment, thereby adapting the degree of change according to performance context.
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
[Problem] To provide an automatic musical performance device and an automatic musical performance program which can carry out automatic musical performance conforming to musical performance of a player in accordance with the player's intention. [Solution] In a synthesizer 1, when an accompaniment change setting is turned on, the rhythm or the pitch of an accompanying sound is switched in accordance with musical performance information from a key 2a by an input pattern search process in S7 or a process in S8. On the other hand, when the accompaniment change setting is turned off, since the processes of S7 and S8 are skipped, the rhythm or the pitch of the accompanying sound is not switched even if the musical performance information from the key 2a changes. Thus, an accompanying sound can be outputted in a mode conforming to musical performance of the player by changing on/off of the accompaniment change setting in accordance with the player's intention.