Siggy was the piano accompanist of Archie Sheep over several decades; he recorded with Dizzy Reece and Hal Singer.
Here is his key LP as leader, in 1971 — with bassist Gus Nemeth and percussionist Stu Martin — edging from post-Trane into free jazz, with an ear for the contemporary electroacoustic music of Xenakis, Berio and co.