Gil Shaham: Bach Preludio, a Chromatic Ascent 

This is part of the following story on Violinist.com:
Violinist Gil Shaham explains to Laurie Niles one way that he looks at the Preludio from Bach's Partita No. 3 in E major: as one long chromatic ascent. This is a bonus video from Gilharmonic on Violinist.com, Episode 5.