Here is the chromatic scale on alto, starting on low Bb. Played slowly while ascending and faster while descending.
(mp3, right click and save)
If you play a chromatic scale like this, slurred, no tonguing, you may discover some sticky pads on your saxophone!
When I took a class with Victor Wooten, he had us play the chromatic scale as a solo. It can be good thing to throw in sometimes.