 During the group's most innovative period of music-making, from 1964 to 1967, Wilson developed elaborate techniques for assembling the band's songs, which combined elements captured on both 4-track and 8-track recorders, as well as making extensive use of tape editing.By 1964, Wilson's increasingly complex arrangements had far outstripped the group's limited musical abilities - singer-guitarist Carl Wilson was the only group member who regularly contributed to these tracking sessions - so Wilson began routinely recording all the instrumental backing tracks for his songs using the team of top-rank professional studio musicians who came to be known as "The Wrecking Crew".For the group's landmark "Pet Sounds" album in 1965, Wilson recorded all the album's elaborate backing tracks using The Wrecking Crew and other session musicians, while the Beach Boys were away touring; the session musicians typically performed these instrumental tracks as ensemble performances, which were recorded and mixed live, direct to a 4-track recorder.