Electronic Musical Interface Chord Function Display
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Solution Overview
Problem
Existing electronic musical instruments struggle to help beginners understand the correspondence between the intended chord changes and their actual performance, as previous display methods do not effectively convey the timing and type of chords played by the user.
Innovation Solution
An electronic musical interface that receives music data and user performance input, analyzes the chords played, and displays them in color-coded regions to match the intended chord progression, allowing users to see if their performance aligns with the music's chord functions (tonic, dominant, or subdominant).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If chord information is displayed color-coded by type in sheet music information, then it becomes easier to identify chord changes, but it is not possible to easily discern whether the type and timing of chords actually played by the user correspond to the type and timing of chords in the music to be played
Solution Approach 1:
The display area is segmented into multiple regions: a first region displaying the chord function progression to be played, and a second region displaying the chord function progression actually played by the user. This spatial segmentation allows simultaneous visualization of both reference and actual performance, enabling beginners to easily compare and understand the correspondence between intended and actual chord changes.
Solution Approach 2:
Different regions of the display are assigned different functional qualities: the first region presents the target chord progression with color-coded chord functions for learning reference, while the second region presents the user's actual performance data with the same color-coding system. This local differentiation enables focused comparison while maintaining visual consistency through uniform color-coding conventions.
2Device complexity
If only sheet music information is displayed without user performance feedback, then the display remains simple, but beginners cannot understand how their performance matches the intended music
Solution Approach 1:
The system merges the display of target chord progression information with user performance feedback into a unified interface. Both the first region (target chords) and second region (played chords) are displayed simultaneously with consistent color-coding, allowing beginners to understand performance correspondence without requiring multiple separate displays or complex additional equipment.
Solution Approach 2:
The system provides immediate visual feedback by displaying the user's actual chord playing results in the second region alongside the target chord progression in the first region. This real-time feedback mechanism allows beginners to instantly see whether their performance matches the intended music, enabling self-correction and improving learning efficiency without increasing overall system complexity.
Data Source
AI summary
An electronic musical interface performs the following: displaying a chord function progression of a first segment of a musical piece that is to be played by a user in a first region of a display via identifiers specifying respective chord functions; playing back an automatic accompaniment of the first segment; receiving user performance data as the user plays the musical note input device along with the playback of the automatic accompaniment; analyzing each chord contained in the obtained user performance data to determine the chord function of each chord the user played; and displaying, in a second region of the display alongside the first region, an identifier that identifies the determined chord function of the chord the user plays so that the user can determine whether the chord function of each chord the user played matches the chord function of the chord displayed in the first region.