The Development of Intelligent Drum Machines Using Cartesian Genetic Programming Initial Report

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  • Topic: Music, Drum machine, Genetic algorithm
  • Pages : 16 (4745 words )
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  • Published : February 24, 2013
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University of York
Department of Electronics

Third year Beng Preliminary Report 2012/13

The Development of Intelligent Drum Machines using Cartesian Genetic Programming

Student ID (Y6385813)

Work For: Julian Miller
Due Monday 11th February 2013

Abstract
Modern day electronic instruments often produce and perform unrealistic music lacking the subtleties introduced by a real life musician. Other than recording a musician or meticulously editing an audio track there is no quick and easy way to replicate this natural feel. Furthermore the factor that adds this organic quality to music cannot always easily be identified, we may not know why we prefer one piece to another only that we prefer it thus the general rules of art cannot be defined. This report addresses the application of Cartesian Genetic Programming; a process based on natural selection to create an intelligent drum machine which alters existing tracks in a way that makes them sound more natural, human and organic over time.

Contents
1.Introduction…………………………………………………………………………………………..……………1 2.Literature Review…………….....……………………………………………………………………………...2 2.1What Makes A Rhythm “Groove”…………………………………………………………………….2 2.2Automatic Composition………………………………………………………………………………….4 2.3Genetic Programming……………….…………………………………………………………………...5 2.4MIDI…………………………………..………………………………………………...……….………………..8 3.The Experiment....…………...………………………….……………………………………………………….9 3.1Proposition and Objectives…………………………………………………………………………….9 3.2 Using Cartesian Genetic Programming and MIDI………………………………………...11 3.3 General Approach and Project Plan………………………………………………………….…13 4.References……………………………………………………………………………………………………..…15 5.Bibliography…………………………………………………………………………………………………….16

1. Introduction
A musician’s need to express their musical ideas in a way that is both acoustically pleasing and comfortable for whom ever is using it cannot always be communicated by themselves alone and often requires external assistance. This aid often comes in the form of an instrument, an interface channelling the thoughts and emotions from a user into their surrounding environment manifested into a physical medium, for example sound and light. This report will focus in on the acoustic exchange of these ideas and so will be restricted to the musical art form. The technology that is developed as a solution to this problem has been developed with two factors in mind; how it sounds and how easy it is for one to successfully express oneself with it, the later is important as it is assumed a user must be in comfort to successfully express their ideas. This criteria can be seen from the very beginnings of human musical history in the altering of drum sizes for variable pitch (figure 1), the use of multiple instruments at a time to implement polyphonic ideas and even the shaping of these instruments into easy to use tools for example a violin exhibiting a vibrating string with a quick and convenient excitation tool, the bow (figure 2).

Figure 1 taken fromFigure 2: taken from
http://www.pikespeakonthecheap.com/?attachment_id=12024www.kirklessmusicschool.org.uk

These are all human creations allowing the manifestation of their internal musical ideas in the physical world. In more recent developments computers have been introduced including applications such as physical modelling, samplers, synthesizers and controllers for these systems of which any music technologist will be well acquainted with. These, much like the previous examples, have been produced to not only add to our bank or musical tools but to further increase the ease of the production of music removing the need to gather a full orchestra, practise the trumpet for 10 years or carry a drum kit around, as all these sounds can now be contained within a small laptop and controlled with a single keyboard. The downside of using computers,...
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