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For this project I will use a one-dimensional or so called elementary cellular automaton, represented as a line of 32 cells. In every time-step of the simulation the state of the cell (living or dead) is considered and than the state of the two neighboring cells, edge-cells will be wrapped around. Living cells will be represented as black and dead cells as white pixel. Rules are encoded by all of the possible combinations of the dead cell itself and its neighboring (2^3 = 8). To represent the rules, they are encoded in one-bit-array of length eight like the following graphic illustrates. | For this project I will use a one-dimensional or so called elementary cellular automaton, represented as a line of 32 cells. In every time-step of the simulation the state of the cell (living or dead) is considered and than the state of the two neighboring cells, edge-cells will be wrapped around. Living cells will be represented as black and dead cells as white pixel. Rules are encoded by all of the possible combinations of the dead cell itself and its neighboring (2^3 = 8). To represent the rules, they are encoded in one-bit-array of length eight like the following graphic illustrates. | ||
[[ | [[File:rules.png|500px] | ||
One rule-set and its representation | One rule-set and its representation | ||
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With theses 8-bits there are 256 possible combinations of rules that can be used for the simulation, these rules often form reoccurring patterns that will be important later. | With theses 8-bits there are 256 possible combinations of rules that can be used for the simulation, these rules often form reoccurring patterns that will be important later. | ||
[[ | [[File:all_rules.png|500px]] | ||
Some elementary cellular automaton rules and their pattern | Some elementary cellular automaton rules and their pattern | ||
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Because there are only five notes per octave and no semitones in a pentatonic scale, they produce a simple harmonies that work well with random, pseudo-random and chaotic but structured input. | Because there are only five notes per octave and no semitones in a pentatonic scale, they produce a simple harmonies that work well with random, pseudo-random and chaotic but structured input. | ||
[[ | [[File:scales.png|500px]] | ||
Different penatonic scales and the matching notes | Different penatonic scales and the matching notes | ||
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The synthesizer works like the following, the cellular automaton is simulated using the selected rule-set. The current state or line of the automaton is than read from left to right and the matching notes of the selected pentatonic scale played (low notes left, high notes right). To give the user more control over the sound, the notes are split up into eight channels of differing pitch. | The synthesizer works like the following, the cellular automaton is simulated using the selected rule-set. The current state or line of the automaton is than read from left to right and the matching notes of the selected pentatonic scale played (low notes left, high notes right). To give the user more control over the sound, the notes are split up into eight channels of differing pitch. | ||
[[ | [[File:approach.png|500px]] | ||
One simulation step visualized | One simulation step visualized | ||
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The synthesizer is web-based using HTML, CSS and JavaScript. To play notes the library Tone.js (js/tone.js)and their default synthesizer is used (js/synth.js). The simulation is visualized using the Canvas-Api and simulated using native JavaScript (js/automata.js). The User-Interface is written in HTML and CSS (index.html) using onclick-event handlers to interact with the simulation (js/gui.js). | The synthesizer is web-based using HTML, CSS and JavaScript. To play notes the library Tone.js (js/tone.js)and their default synthesizer is used (js/synth.js). The simulation is visualized using the Canvas-Api and simulated using native JavaScript (js/automata.js). The User-Interface is written in HTML and CSS (index.html) using onclick-event handlers to interact with the simulation (js/gui.js). | ||
[[ | [[File:finished.png|500px]] | ||
The final synthesizer-ui | The final synthesizer-ui | ||