click here to listen to the sound file.
click here to look at the code for generating the original pulse track.
click here to look at the code for turning the track into an irrational set.
this is a continuing experiment that extends my work in massive irrational rhythmic / harmonic sets. for some theoretical background, consult this earlier blog entry. i have been exploring the effects of taking many copies of a sonic event, retuning it to a large irrational set- generally some equal-temperament scale- and playing all of those copies simultaneously. the resulting copies begin perfectly aligned, but gradually move out of phase with one another and produce a doppler-like shift, with ever-increasing and expanding complexity since the sets never realign. i have tried other irrational sets, as you will see from my fairly messy code, but so far nothing has compared to the geometric series produced by many-toned equal-temperaments. the difference between this code and the earlier experiments is that instead of firing off events directly, i am retuning an entire track of audio to produce something like an irrational delay.
the one issue i have with the process is that the waves fall out of alignment very perceptibly quickly, and as this process progresses the changes become more subtle. the transformation becomes essentially less interesting as time goes on. i have found one way to combat this is to gradually speed everything up. this works to an extent, and i will continue looking into different curves that might aid this effect further. another set of experiments i have done in the past involved delaying the items in the set to cause the 'singularity point' to occur at a time other than the beginning. i would like to try that approach with this implementation, but that will have to happen later.
the original track, which i may also post later, is derived from a bizarre version of an excitation-response style percussion synthesizer. the filter responses themselves are irrational sets, which i have found produces a nice doppler-esque tail, similar to the inharmonic ringing of a piano string. the pattern itself repeats fairly quickly, and divides the pulse into fifths.