Patent ID: 7288711

Claim:
A chord presenting apparatus comprising: a chord information storage device for storing plural pieces of chord information which represent a series of chords; a chord presenting device for reading out chord information stored in said chord information storage device and for presenting chords represented by the chord information to a user; a chord conversion table that stores conversion information for converting a first chord progression to a second chord progression; a chord detector that searches and detects plural pieces of chord information, representing the first chord progression from among the plural pieces of chord information stored in said chord information storage device, from the chord conversion table; and a chord converter that converts the plural pieces of chord information representing the first chord progression to the second chord progression in accordance with the conversion information stored in said chord conversion table, so as to supply the converted chord progression to said chord presenting device, after when a series of the plural pieces of chord information representing the entirety of the first chord progression is found in the conversion table, wherein said first chord progression consists of a first series of chords, and said second chord progression consists of a second series of chords, where at least one of the chords thereof is different from said first series of chords.