[dups]

Its very different from DJing. Instead of controlling music with algorithms, you are _create_ music with algorithms on the fly, so to speak.

For example, you might define a sine wave oscillator, and control it with a markov model that holds chains of possible notes. Then you integrate this with other processes and variable and so forth.

If you are interested, check out the Supercollider language, Its great fun!

http://supercollider.sourceforge.net/

[teeja]

Exactly. If you'd like to try it yourself without devoting MANY hours to Supercollider, try [ChucK](http://chuck.cs.princeton.edu/). Unlike DJing there are no samples or external gear, but "real-time synthesis, composition, and performance".