Just a few years ago, he was getting intrigued, often admiring press for his rocker persona, uninhibited commentary, and astonishing technical skills. (Video of his manically flying feet at the pedalboard made him something of a YouTube star.) And he’d spent hundreds of thousands of dollars (and gone into debt) developing his Virtual Touring Organ, the electronic instrument to end all electronic instruments. Then, in 2014, Sony Masterworks released a documentary about him that became, frankly, a disaster. – Van