Music – Instruments – Electrical musical tone generation
Reexamination Certificate
1999-08-24
2001-10-02
Witkowski, Stanley J. (Department: 2837)
Music
Instruments
Electrical musical tone generation
C084S667000, C084SDIG001, C084SDIG001
Reexamination Certificate
active
06297439
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a system and method for automatically generating music on the basis of an initial sequence of input notes, and in particular to such a system and method utilising a recursive artificial neural network architecture.
The invention has been developed primarily to learn and emulate music of a given style or by a specific composer, and will be described hereinafter with reference to this application. However, it will be appreciated that the invention is not limited to this field of use.
BACKGROUND
Automatic generation of music is a relatively complex task, due to the difficulties associated with defining subjectively aesthetically pleasing factors in a way that enables a computer or the like to generate music. A simpler task is the production of chordal rhythmic accompaniment in real time, which has become a standard feature of many synthesizers. In its simplest form, such accompaniment involves interpreting chords or notes input by a user and generating a suitable accompaniment in the form of rhythmic chords or arpeggios.
An advanced system known as “EMI” uses augmented transition networks (ATMs), and is capable of producing relatively high quality works of music in the style of famous composers. EMI is based on a knowledge base of musical sequences known to be representative of a composer's work, which arc subsequently assembled using a musical grammar under the direction of a skilled human user. Unfortunately, the subjective quality of music generated by the EMI system is variable, and the system requires a great deal of skill on the part of the user to extract its full potential.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an improved automatic music generation system for generating music which is evocative of a given style or composer.
Accordingly, in a first aspect, the present invention provides a system for automatically generating music on the basis of an initial note sequence input, the system including:
a score interpreter for interpreting each note in the initial input sequence, thereby to generate current note pitch data, current note duration data and current note musical context data;
a rhythm production part for generating a subsequent note duration output on the basis of the current note duration data, the current musical context data and note duration information stored in state units associated with the rhythm production part;
a note generation part for generating a subsequent note on the basis of the subsequent note duration output, the current note pitch data, the current note musical context data, the current note duration data, and duration and pitch information stored in state units associated with the note generation part; and
feedback means for feeding the pitch and duration of the subsequent note back to the rhythm generation and note generation parts, the subsequent note thereby becoming the current note for a following iteration.
According to another aspect, the invention provides a method of automatically generating music on the basis of an initial note sequence input, the apparatus including:
interpreting each note in the initial input sequence, thereby to generate current note pitch data, current note duration data and current note musical context data;
generating a subsequent note duration output on the basis of the current note duration data using a rhythm production part;
storing the current musical context data and note duration information in one or more state units associated with the rhythm production part;
generating a subsequent note using a note generation part on the basis of the subsequent note duration output, the current note pitch data, the current note musical context data, the current note duration data, and duration and pitch information stored in state units associated with the note generation part; and
feeding back the pitch and duration of the subsequent note back to the rhythm generation and note generation parts, the subsequent note thereby becoming the current note for a following iteration.
According to another aspect, the invention provides a computer program product including a computer readable medium having recorded thereon a computer program for automatically generating music on the basis of an initial note sequence input, the computer program comprising:
interpretation process steps arranged to interpret each note in the initial input sequence, thereby generating current note pitch data, current note duration data, and current note musical context data;
generating process steps arranged to generate a subsequent note duration output on the basis of the current note duration data using a rhythm production part;
storing process steps arranged to store the current musical context data and note duration information in one or more state units associated with the rhythm production part;
generation process steps arranged to generate a subsequent note using a note generation part on the basis of the subsequent note duration output, the current note pitch data, the current note musical context data, the current note duration data, and duration and pitch information stored in state units associated with the note generation part; and
feedback process steps arranged to feed the pitch and duration of the subsequent note back to the rhythm generation and note generation parts, the subsequent note thereby becoming the current note for a following iteration.
REFERENCES:
patent: 4345501 (1982-08-01), Nakada et al.
patent: 5635659 (1997-06-01), Miyamoto
patent: 5920025 (1999-07-01), Itoh et al.
patent: WO 96/12221 (1996-04-01), None
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Witkowski Stanley J.
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