From time to time, I sit down, focus for a few weeks, and make a musical composition.
In my latest, Solitude, I explored Pd’s graphical data structures:

In the above score, time flows from left to right. Each color represents a sample. Each sample controller has two arrays: the brighter, bigger one on top controls sample playback; and a smaller darker one at the bottom controls amp and pan. The lowest point of the sample array is the beginning of the sample, the highest is the end, and the height of the array is how much and what part of the sample to play starting at that point in time. There are between 50 and 100 voice polyphony for the samples. The height of the amp/pan array is the amp, and the y location is the pan.
Have a listen:
Solitude_-_Hans-Christoph_Steiner_-_2004.mp3
For more info: http://at.or.at/hans/solitude/
With the group at.or.at, we set up a sound installation in an 160 year old abandoned subway tunnel in Brooklyn, New York. There were 10 channels up a 200m length of the tunnel and we performed live using a wide range of train samples, generating a range of sound from rhythmic to ambient.

To get an idea of what it sounded like, have a listen:
Novnain_Jam_-_at.or.at_-_2002.mp3
Novnain_Passing_-_at.or.at_-_2002.mp3
Novnain_Whistles_-_at.or.at_-_2002.mp3
For more info: http://at.or.at/hans/novnain/