Automatic chord generating device for an electronic musical instrument

An automatic accompaniment device for an electronic musical instrument, comprising:

• chord type information generating means having an output, said means for generating chord type information indicating one of the types of chords being produced;
• chord root information generating means having an output, said means for generating chord root information indicating the pitch name of a root note of said one chord type;
• chord bass information generating means having an output, said means for generating chord bass information indicating the pitch name of the lowest note of said chord type;
• and
• accompaniment pattern information generating means connected to the outputs of said chord type information generating means, said chord root information generating means and said chord bass information generating means for generating accompaniment pattern information of the contents corresponding to said chord type information, said chord root information and said chord bass information;
• wherein said accompaniment pattern information includes chord tone information indicating, for each tone of the said pattern information, a chord tone of the pitch name of a note constituting said chord, and non-chord-tone information indicating a non-chord-tone of the pitch name of a note other than said note constituting said chord;
• and
• accompaniment pattern note generating means operationally coupled to said information accompaniment pattern means and receiving the information from said accompaniment pattern information generating means, for changing the pitch name of each chord tone, in said chord tone information, with a pitch name of the tones of the chord and in relation to the pitch name of the lowest note of said chord, while maintaining unchanged said non-chord-tone information.