Complex sentence: Alternative versions of tracks 2--5, later issued as "First Meditations (for quartet)", had been recorded in September 1965 by the same musicians minus Rashied Ali and Sanders, and were more restrained, containing less squealing and fewer overblown notes.
Split into simpler sentences: Alternative versions of tracks 2--5 had been recorded in September 1965 by the same musicians minus Rashied Ali and Sanders. These recordings were later issued as "First Meditations (for quartet)" and were more restrained, containing less squealing and fewer overblown notes.