Altering pitch of sound from cycling speed / direction

Back in London BRI lab working with different ways of altering pitch of sound from either cycling speed, direction or random. One problem is that we can’t alter the pitch more than one octave up or down and the other is that we’re using GPS as our locator, so apart from delays with response times, there’s of course the ever present variable of getting GPS fixes in the first instance. The final result also has to give the cyclist some sense of understanding what’s happening so it has some meaning and is worth playing with. All a bit arduous but today finally a breakthrough. After many experiments with different sounds, locations, layers and settings, I’ve decided on bike direction as the most useful controller, am working with 3 layers of shortish resonant dong sounds and by dusk am cycling around and around in varying shapes as happy park strollers gasp in amazement with pitching sliding dongs and bongs donging and gliding up and down all around them.