Sad to learn that Keith has died so young - he was a truly great jazz & avant garde pianist of immense stature. I'll never forget playing in his ~30 strong Seedbed Orchestra on the Thekla decades ago. In the middle of one piece at a certain point, the piano score asked for the fairly complex chord Dm7-5+13. I could not quickly work out where +13 was so left it out - yet over the top of the rest of the orchestra he called to me "+13 Vaughan!" A truly consummate musician.