Use this to randomize the values in a list/vector-of-values of note-lengths, zone-lengths or velocities. The function takes each number to be randomized as a top limit so that the randomization takes place between 0 and that value. Optional seed can be used to initialize the process.
See its use in conjunction with build-zones. Note also that the use of gen-noise-brownian/ gaussian gives random zones that has tendensies, which often give better results.