https://soundcloud.com/mtnviewmark-bits/sliding-study-1-disquiet0249
I didn’t quite follow the Junto instructions, instead drawing inspiration form Steve Reich’s later techniques. This is really a study for a compositional element that I’ve been slowing thinking about for over a year. This is the first time I’ve recorded anything based on it, and it is certainly a bit rough, hardly a finished work.
The source material is just two, 2 bar marimba phrases in 4/4 time. These two phrases are played against each other at various poly-rhythmic patterns: first 4:4, then 3:4, 4:5, 3:4, and finally 2:1. However, the shifts from one poly-rhythm to the next are accomplished not by jumping, but by slowing or speeding up the tempo of one or both parts smoothly. (It takes quite some math to get the timing to work out!) Further, in this work, the loops are allowed to repitch (like tape, so a nod to the Reich’s use of tape loops), and so not only do you get a new poly-rhythm, but also a new interval between the two parts.
An additional metal gong accompanies the start and end of each glide, and a shaker carries the tempo of one of the phrases.
This technique is inspired by both the various phasing techniques of Steve Reich, and a glissandi piece by Richard Borovosky (~1980, trying to find a reference.)