A couple of older videos from Beatsociety Philadelphia 2003 featuring Kanye West and Illmind collaborating to create a beat live on stage.  The second video has Illmind showcasing a beat straight out of a Korg Triton with Kanye going nuts on the left and 88 Keys doing The Wop on the right.

Respect to Illmind for supplying classic material.

Related posts:

1. Kanye West: Making of “Good Life”
2. Illmind, 88 Keys, And Oddisee Live
3. Video of DJ Premier Making Beats on “Classic” Kanye West ft Nas, KRS-One, Rakim
4. Kanye West Making A Beat On The MPC 2000 & ASR 10
5. The Best Beat Making Videos