http://wiki.cs.princeton.edu/index.php/ChucK/Features/Release - the most prioritized feat for next release is extending maybe. As I just thought of it today and my thoughts are better than there - I think that a simple overload for multiplication operator would be just enough. Like this: if (maybe * 0.2) { // Runs with probability of 20% } Or, more coherent, but less nice: if (maybe(0.2)) { // Runs with probability of 20% } Then, when doing switches, how to handle those? It would be nice to have something like: switch { case maybe * 0.3: case maybe * 0.5: case maybe * 0.6: case true: } In case it would automatically fix all maybes - so that actual probabilities would add up to 100% and, thus, first one is fixed to about 0.2 and second one to slightly less than 0.5 ..this would allow really nice play with probabilities (and, of course, optimizations internally). Tambet