Automatic chord generating device for an electronic musical instrument

Patent 5294747 Issued on March 15, 1994. Estimated Expiration Date:

February 28, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Harmony recognition technique application
Patent #: 4248118
Issued on: 02/03/1981
Inventor: Hall , et al.

Electronic musical instrument with automatic accompaniment device
Patent #: 4315451
Issued on: 02/16/1982
Inventor: Uchiyama , et al.

Orchestral accompaniment techniques
Patent #: 4433601
Issued on: 02/28/1984
Inventor: Hall , et al.

Automatic bass chord accompaniment apparatus for an electronic musical instrument Patent #: 4864907
Issued on: 09/12/1989
Inventor: Oguri

Inventors

Assignee

Roland Europe S.p.A.

Application

No. 843718 filed on 02/28/1992

US Classes:

84/669Chords

Examiners

Primary: Witkowski, Stanley J.

Attorney, Agent or Firm

Keck, Mahin & Cate

International Class

G10H 001/38

Foreign Application Priority Data

1991-03-01 IT

Abstract

An automatic accompaniment device for generating chords in an electronic musical instrument. This device has a chord type information generator which indicates one of the type of chords being produced; a chord root information generator which indicates the pitch name of a root note of the chord type; and a chord bass information generator which indicates the pitch name of the lowest note of the chord type. The information from the three generators is used by an accompaniment pattern information generator to generate pattern information relating to the chord type, chord root and chord bass information. For each tone of the pattern, the pattern information contains the pitch name of a note in the chord and non chord tone of a note not present in the chord. An accompaniment pattern is generated with the accompaniment pattern information to change the pitch name of each chord tone in relation to the bass chord.