DJDarwin
A Genetic algorithm approach to creating beats.
...Using a genetic algorithmic framework, the user's taste defines a Beat fitness function - she decides which beats survive and breed, and which join the choir invisible.
In addition, the user can easily define an automatic fitness function, put the program on 'autopilot' mode, and let it speed up evolution.
Different types of mutations (including inactive genes, changing instruments, and more) occur randomly (or at the user's control), and the user can add her own beats to the population.
The program was written by Nir Rosenfeld and Assaf Michaely.