Heavyweight, check the bass-line on Sorry Bout Dat. Hardcore essential.
A must-have for anyone interested in '60's African-American avant-garde jazz. This is improvisational music of the highest order with Archie's saxophone set agains some ferocious drumming by the likes of Ed Blackwell et al on the title track and some first-class small group stuff on the other three tracks. This is one of the key albums of the period and no avant-garde jazz collection is complete without it.