http://www.flickr.com/photos/farnea/tags/stochastic/ Mon, 19 Mar 2012 01:31:40 -0700 Mon, 19 Mar 2012 01:31:40 -0700 http://www.flickr.com/ http://farm1.staticflickr.com/78/buddyicons/83046634@N00.jpg?1187081005#83046634@N00 http://www.flickr.com/photos/farnea/tags/stochastic/ http://www.flickr.com/photos/farnea/6849915410/ <p><a href="http://www.flickr.com/people/farnea/">farnea</a> posted a photo:</p> <p><a href="http://www.flickr.com/photos/farnea/6849915410/" title="Arduino stochastic autogenerative carillon"><img src="http://farm7.staticflickr.com/6236/6849915410_507a2e1c3e_m.jpg" width="240" height="180" alt="Arduino stochastic autogenerative carillon" /></a></p> <p>This Arduino based project is a stochastic melody generator I'm realizing for my newborn daughter.<br /> <br /> <br /> SPECIFICATIONS<br /> <br /> The carillon has two voices (bass and melody) randomly generated from a pentatonic scale.<br /> <br /> The sequence counts four 4/4 beats.<br /> <br /> The bass moves on 1/4 notes and consist of 2 measures repeated twice.<br /> <br /> The melody plays 1/8 notes and pauses, for the all 4 measures length. Melody plays at least one octave over the bass.<br /> <br /> On the first measure the bass plays alone, melody plays from the second measure based on a random choice.<br /> <br /> Every four measures, the software chooses if generate a new sequence for bass, melody or both of them.<br /> <br /> Pressing a button invokes an interrupt that reset the generator with a new tempo and scale.<br /> <br /> The pentatonic scales are 24, 12 major and 12 minor.<br /> <br /> The bpm can assume a value from: 60, 90, 120, 180.<br /> <br /> When starting software, the random generator is set with a seed taken from analog input 0. In not connected, the seed would be a random noise values, otherwise you can set seed value using a knob.<br /> <br /> A software switch, set when building, adds a further variation level, allowing a momentary semitone alteration of a melody note (the same grade of the previous or following scale will be played).<br /> <br /> Randomness is not uniform, but you can tune it giving a weight for some events. So the scale and bpm choice is uniform, but the probability that the melody plays on second measure is 75%, that the semitone alteration occurs (when enabled) is 10%, that a new sequence for bass or melody is generated is 50%. You can set this weight when building.<br /> <br /> The generation of sound is made using two PWM outputs connected to a piezo speaker. The software is using the Tone library.<br /> <br /> A digital output can drive a LED, blinking it on tempo frequency.<br /> <br /> Three outputs drive an RGB LED, changing color on tempo and note frequency values.<br /> <br /> EXPERIMENTAL VARIATIONS<br /> <br /> - MIDI output instead of internal sound generation.<br /> <br /> - Digital output driving solenoids or servos.<br /> <br /> - Analog/digital input for tempo and scale selection or change randomness behavior.<br /> <br /> - Rules for automatic tempo and scale change.<br /> <br /> - Microtonal approach.<br /> <br /> SAMPLE HERE<br /> <br /> <a href="http://soundcloud.com/maxfarnea/sets/diy-experimental-sessions/" rel="nofollow">soundcloud.com/maxfarnea/sets/diy-experimental-sessions/</a><br /> <br /> VIDEO HERE<br /> <br /> <a href="http://www.youtube.com/watch?v=XCt9-f3kTwc" rel="nofollow">www.youtube.com/watch?v=XCt9-f3kTwc</a></p> Mon, 19 Mar 2012 01:31:40 -0700 2012-03-18T20:21:13-08:00 nobody@flickr.com (farnea) tag:flickr.com,2004:/photo/6849915410 Arduino stochastic autogenerative carillon <p>This Arduino based project is a stochastic melody generator I'm realizing for my newborn daughter.<br /> <br /> <br /> SPECIFICATIONS<br /> <br /> The carillon has two voices (bass and melody) randomly generated from a pentatonic scale.<br /> <br /> The sequence counts four 4/4 beats.<br /> <br /> The bass moves on 1/4 notes and consist of 2 measures repeated twice.<br /> <br /> The melody plays 1/8 notes and pauses, for the all 4 measures length. Melody plays at least one octave over the bass.<br /> <br /> On the first measure the bass plays alone, melody plays from the second measure based on a random choice.<br /> <br /> Every four measures, the software chooses if generate a new sequence for bass, melody or both of them.<br /> <br /> Pressing a button invokes an interrupt that reset the generator with a new tempo and scale.<br /> <br /> The pentatonic scales are 24, 12 major and 12 minor.<br /> <br /> The bpm can assume a value from: 60, 90, 120, 180.<br /> <br /> When starting software, the random generator is set with a seed taken from analog input 0. In not connected, the seed would be a random noise values, otherwise you can set seed value using a knob.<br /> <br /> A software switch, set when building, adds a further variation level, allowing a momentary semitone alteration of a melody note (the same grade of the previous or following scale will be played).<br /> <br /> Randomness is not uniform, but you can tune it giving a weight for some events. So the scale and bpm choice is uniform, but the probability that the melody plays on second measure is 75%, that the semitone alteration occurs (when enabled) is 10%, that a new sequence for bass or melody is generated is 50%. You can set this weight when building.<br /> <br /> The generation of sound is made using two PWM outputs connected to a piezo speaker. The software is using the Tone library.<br /> <br /> A digital output can drive a LED, blinking it on tempo frequency.<br /> <br /> Three outputs drive an RGB LED, changing color on tempo and note frequency values.<br /> <br /> EXPERIMENTAL VARIATIONS<br /> <br /> - MIDI output instead of internal sound generation.<br /> <br /> - Digital output driving solenoids or servos.<br /> <br /> - Analog/digital input for tempo and scale selection or change randomness behavior.<br /> <br /> - Rules for automatic tempo and scale change.<br /> <br /> - Microtonal approach.<br /> <br /> SAMPLE HERE<br /> <br /> <a href="http://soundcloud.com/maxfarnea/sets/diy-experimental-sessions/" rel="nofollow">soundcloud.com/maxfarnea/sets/diy-experimental-sessions/</a><br /> <br /> VIDEO HERE<br /> <br /> <a href="http://www.youtube.com/watch?v=XCt9-f3kTwc" rel="nofollow">www.youtube.com/watch?v=XCt9-f3kTwc</a></p> farnea music diy experimental carillon massimiliano arduino stochastic farnea maxfarnea http://creativecommons.org/licenses/by-nc-sa/2.0/deed.en http://www.flickr.com/photos/farnea/6849920030/ <p><a href="http://www.flickr.com/people/farnea/">farnea</a> posted a photo:</p> <p><a href="http://www.flickr.com/photos/farnea/6849920030/" title="Arduino stochastic autogenerative carillon"><img src="http://farm7.staticflickr.com/6238/6849920030_aca0fa44e6_m.jpg" width="240" height="180" alt="Arduino stochastic autogenerative carillon" /></a></p> <p>This Arduino based project is a stochastic melody generator I'm realizing for my newborn daughter.<br /> <br /> <br /> SPECIFICATIONS<br /> <br /> The carillon has two voices (bass and melody) randomly generated from a pentatonic scale.<br /> <br /> The sequence counts four 4/4 beats.<br /> <br /> The bass moves on 1/4 notes and consist of 2 measures repeated twice.<br /> <br /> The melody plays 1/8 notes and pauses, for the all 4 measures length. Melody plays at least one octave over the bass.<br /> <br /> On the first measure the bass plays alone, melody plays from the second measure based on a random choice.<br /> <br /> Every four measures, the software chooses if generate a new sequence for bass, melody or both of them.<br /> <br /> Pressing a button invokes an interrupt that reset the generator with a new tempo and scale.<br /> <br /> The pentatonic scales are 24, 12 major and 12 minor.<br /> <br /> The bpm can assume a value from: 60, 90, 120, 180.<br /> <br /> When starting software, the random generator is set with a seed taken from analog input 0. In not connected, the seed would be a random noise values, otherwise you can set seed value using a knob.<br /> <br /> A software switch, set when building, adds a further variation level, allowing a momentary semitone alteration of a melody note (the same grade of the previous or following scale will be played).<br /> <br /> Randomness is not uniform, but you can tune it giving a weight for some events. So the scale and bpm choice is uniform, but the probability that the melody plays on second measure is 75%, that the semitone alteration occurs (when enabled) is 10%, that a new sequence for bass or melody is generated is 50%. You can set this weight when building.<br /> <br /> The generation of sound is made using two PWM outputs connected to a piezo speaker. The software is using the Tone library.<br /> <br /> A digital output can drive a LED, blinking it on tempo frequency.<br /> <br /> Three outputs drive an RGB LED, changing color on tempo and note frequency values.<br /> <br /> EXPERIMENTAL VARIATIONS<br /> <br /> - MIDI output instead of internal sound generation.<br /> <br /> - Digital output driving solenoids or servos.<br /> <br /> - Analog/digital input for tempo and scale selection or change randomness behavior.<br /> <br /> - Rules for automatic tempo and scale change.<br /> <br /> - Microtonal approach.<br /> <br /> SAMPLE HERE<br /> <br /> <a href="http://soundcloud.com/maxfarnea/sets/diy-experimental-sessions/" rel="nofollow">soundcloud.com/maxfarnea/sets/diy-experimental-sessions/</a><br /> <br /> VIDEO HERE<br /> <br /> <a href="http://www.youtube.com/watch?v=XCt9-f3kTwc" rel="nofollow">www.youtube.com/watch?v=XCt9-f3kTwc</a></p> Mon, 19 Mar 2012 01:34:20 -0700 2012-03-18T20:20:23-08:00 nobody@flickr.com (farnea) tag:flickr.com,2004:/photo/6849920030 Arduino stochastic autogenerative carillon <p>This Arduino based project is a stochastic melody generator I'm realizing for my newborn daughter.<br /> <br /> <br /> SPECIFICATIONS<br /> <br /> The carillon has two voices (bass and melody) randomly generated from a pentatonic scale.<br /> <br /> The sequence counts four 4/4 beats.<br /> <br /> The bass moves on 1/4 notes and consist of 2 measures repeated twice.<br /> <br /> The melody plays 1/8 notes and pauses, for the all 4 measures length. Melody plays at least one octave over the bass.<br /> <br /> On the first measure the bass plays alone, melody plays from the second measure based on a random choice.<br /> <br /> Every four measures, the software chooses if generate a new sequence for bass, melody or both of them.<br /> <br /> Pressing a button invokes an interrupt that reset the generator with a new tempo and scale.<br /> <br /> The pentatonic scales are 24, 12 major and 12 minor.<br /> <br /> The bpm can assume a value from: 60, 90, 120, 180.<br /> <br /> When starting software, the random generator is set with a seed taken from analog input 0. In not connected, the seed would be a random noise values, otherwise you can set seed value using a knob.<br /> <br /> A software switch, set when building, adds a further variation level, allowing a momentary semitone alteration of a melody note (the same grade of the previous or following scale will be played).<br /> <br /> Randomness is not uniform, but you can tune it giving a weight for some events. So the scale and bpm choice is uniform, but the probability that the melody plays on second measure is 75%, that the semitone alteration occurs (when enabled) is 10%, that a new sequence for bass or melody is generated is 50%. You can set this weight when building.<br /> <br /> The generation of sound is made using two PWM outputs connected to a piezo speaker. The software is using the Tone library.<br /> <br /> A digital output can drive a LED, blinking it on tempo frequency.<br /> <br /> Three outputs drive an RGB LED, changing color on tempo and note frequency values.<br /> <br /> EXPERIMENTAL VARIATIONS<br /> <br /> - MIDI output instead of internal sound generation.<br /> <br /> - Digital output driving solenoids or servos.<br /> <br /> - Analog/digital input for tempo and scale selection or change randomness behavior.<br /> <br /> - Rules for automatic tempo and scale change.<br /> <br /> - Microtonal approach.<br /> <br /> SAMPLE HERE<br /> <br /> <a href="http://soundcloud.com/maxfarnea/sets/diy-experimental-sessions/" rel="nofollow">soundcloud.com/maxfarnea/sets/diy-experimental-sessions/</a><br /> <br /> VIDEO HERE<br /> <br /> <a href="http://www.youtube.com/watch?v=XCt9-f3kTwc" rel="nofollow">www.youtube.com/watch?v=XCt9-f3kTwc</a></p> farnea music diy experimental carillon massimiliano arduino stochastic farnea maxfarnea http://creativecommons.org/licenses/by-nc-sa/2.0/deed.en