Complex sentence: He was primarily self-taught but did study music as a school boy and at Frankfurt from 1868 until 1882 (from 1878 in the Hoch Conservatory).
Split into simpler sentences: He was primarily self-taught but did study some as a school boy and at Frankfort. Taught at Frankfort 1868-82 (from 1878 in the Hoch Conservatory).