Complex sentence: His compositional output consists of only four books of pieces for five-course Baroque guitar, and while many of Abatessa's contemporaries used the guitar as an accompaniment for the voice, Abatessa's main focus was on the guitar as a solo instrument.
Split into simpler sentences: His compositional output consists of four books of pieces for five-course Baroque guitar. While many of Abatessa's contemporaries used the guitar as an accompaniment for the voice, Abatessa's main focus was on the guitar as a solo instrument.