Junichi Minamitaka

Automatic composer for composing a melody in real time

A composition conditioning system selects a music structure from a music structure database. The selected music structure specifies a first condition of music composition. A style input specifies a second condition of music composition. A melody rhythm composer retrieves, from a rhythm pattern database, an appropriate rhythm pattern for the composition condition. A chord progression composer retrieves, from a chord progression database, a suitable chord progression for the composition condition. A melody pitch composer generates a pitch candidate for a new melody note from an old melody note pitch and a current music progression (tonality and chord). A pattern recognizing module analyzes a melody up to the candidate into a melody pattern. A test module searches through a melody pattern rule base for the analyzed melody pattern.

Automatic composer using input motif information

An automatic composer comprises an input device which inputs part of a musical piece and information on the progression of music such as a chord progression, an analyzer which extracts parameters characterizing the part of the musical piece, and a melody generator which develops the complete musical piece by using the characteristic parameters and the chord progression. As a result, the characteristics of the part of the musical piece may be present, to a desired extent, throughout the completed musical piece, so that a satisfactory balance is achieved between the consistency and variety of the music.

Automatic composer for forming rhythm patterns and entire musical pieces

A automatic composer automatically forms a rhythm pattern. Reference rhythm patterns representing a sequence of a plurality of tone durations are generated, and a pulse scale source provides a pulse scale of pulse points having weights for joining or disjoining tone durations, depending on their positions. The reference rhythm pattern is modified by executing one of joining or disjoining tone durations in accordance with the pulse scale. Also disclosed is an automatic composer for composing an entire musical piece, wherein featuring parameters are extracted from an inputted portion of a musical piece, and an entire musical piece is composed in accordance with at least the extracted featuring parameters. According to a preferred arrangement, the featuring parameters are extracted in accordance with at least one of a sequence of tone pitches and a sequence of tone durations, the sequences defining the inputted portion of the musical piece.

APPARATUS FOR DETERMINING TONALITY FOR CHORD PROGRESSION

A tonality determining apparatus provides a tonality analysis of a chord progression. The apparatus includes a chord function knowledge database storing musical knowledge of evaluating a function of each chord in the chord progression. A keynote and function progression extractor determines a keynote and function of each chord in the chord progression from a chord progression input device in accordance with the function knowledge database. From the extractors results a tonality data generator produces tonality data defining a pitch class set available in each chord time interval. The tonality determining apparatus is applied to an accompaniment apparatus for playing an accompaniment with a desired tonality.

Music apparatus for determining scale of melody by motion analysis of notes of the melody

A music apparatus determines a scale suitable for a given melody. The apparatus includes a motion analyzer which analyzes motion in the melody. In an embodiment, a note coupling evaluator evaluates a coupling coefficient of each note in the melody based on a pitch interval pattern of surrounding notes. Using the evaluated results, a tonic and type of a scale for the melody is determined.

Electronic musical instrument with glide function

An electronic musical instrument has a keyboard, a key depression speed detector and a glide pattern generator. When any key of the keyboard is depressed, the key depression speed detector detects the speed of depressing the key and produces a signal representing this speed. In accordance with this signal the glide pattern generator changes a reference glide pattern to a new pattern. The instrument generates a musical tone having the glide effect determined by the new glide pattern.