Tim Hecker — Ravedeath, 1972

This one slipped under my radar for years. He collaborated with Ben Frost, who I absolutely love, but who now does scores more than the contemplative, well constructed, grungy, drony things he once did. And if you find yourself loving it, you can find a good condition vinyl on Discogs for a reasonable price, which is more than I can say for some of Ben Frost's older work.