Complex sentence: He had frequently performed such material in the 1970s and 1980s, but only recorded it occasionally; now he began to release multidisc sets of such material, climaxing in two quadruple-CD sets for Leo Records recorded on tour in 2003.
Split into simpler sentences: He had frequently performed such material in the 1970s and 1980s, but only recorded it occasionally. Now he began to release multidisc sets of such material, climaxing in two quadruple-CD sets for Leo Records recorded on tour in 2003.