Complex sentence: Unlike the other members of the band, Carl often played side-by-side with session pros, or recorded his indvidual guitar leads during the Beach Boys' vocal sessions, with his guitar plugged directly into the soundboard.
Split into simpler sentences: Unlike the other members of the band, Carl often played alongside with session musicians. He also recorded his indvidual guitar leads during the Beach Boys' vocal sessions, with his guitar plugged directly into the soundboard.