An interesting Markov based sampler. Here’s the app’s description:
Nodal is an iPad sampler based on the research of Andrey Markov, a Russian mathematician who lived a very long time ago and had a very crazy beard. You know what else is crazy? The sounds you’ll get from this iPad app. Just pick some of the gnarly sounds included with it or record your own and link them together to hear the sweet sounds of probability theory.
Nodal costs $1.99 on the app store now: