Chord-playing instruction device, chord-playing instruction method, and recording medium

A chord-playing instruction method comprising the steps of:

• storing, for each chord type, in a memory, chord-type information of a chord and relationship information indicating relationship between a plurality of constituent notes including a tonic of the chord, as a set of chord information;
• causing a display to show a plurality of music-playing operators arranged sequentially;
• reading out the stored set of chord information when a tonic of a chord is specified, and then causing the display to show
• relationship information related to a constituent note other than the tonic, included in the read-out set of chord information,
• chord-type information of the chord, and
• an indicator that indicates a positional relationship between the tonic and a constituent note other than the tonic on the shown music-playing operators, based on a position of the specified tonic;
• and
• extracting a set of chord information including relationship information that matches with relationship between the specified tonic and each of all notes specified subsequently to the tonic, from the stored sets of chord-information, when a different note is specified after specification of the tonic, and causing the display to show
• relationship information related to a constituent note other than the specified notes, included in the extracted set of chord information,
• chord-type information of the chord, and
• an indicator that indicates a positional relationship between the tonic and a constituent note other than the specified constituent notes on the shown music-playing operators, based on the position of the specified tonic.

A non-transitory recording medium that stores a program for causing a computer to execute:

• a chord-information storing step of storing, for each chord type, in a memory, chord-type information of a chord and relationship information indicating relationship between a plurality of constituent notes including a tonic of the chord, as a set of chord information;
• a step of causing a display to show a plurality of music-playing operators arranged sequentially;
• a first instruction display step of reading out a corresponding set of chord information stored by the chord-information storing step when a tonic of a chord is specified, and then causing the display to show
• relationship information related to a constituent note other than the tonic, included in the read-out set of chord information,
• chord-type information of the chord, and
• an indicator that indicates a positional relationship between the tonic and a constituent note other than the tonic on the shown music-playing operators, based on a position of the specified tonic;
• and
• a second instruction display step of extracting a set of chord information including relationship information that matches with relationship between the specified tonic and each of all notes specified subsequently to the tonic, from sets of chord information stored by the chord-information storing step, when a different note is specified after specification of the tonic, and causing the display to show
• relationship information related to a constituent note other than the specified notes, included in the extracted set of chord information,
• chord-type information of the chord, and
• an indicator that indicates a positional relationship between the tonic and a constituent note other than the specified constituent notes on the shown music-playing operators, based on a position of the specified tonic.