The "disco sound" layers soaring, often reverberated vocals, which are often doubled by horns, over a background "pad" of electric pianos and "chicken-scratch" guitars. Other backing keyboard instruments include the piano, string synth, and electroacoustic keyboards such as the Fender Rhodes piano, Wurlitzer electric piano, and Hohner Clavinet. The rhythm is laid down by prominent, syncopated basslines played on the bass guitar and by drummers using a drum kit, African/Latin percussion, and electronic drums such as Simmons and Roland drum modules). The sound was enriched with solo lines and harmony parts played by a variety of orchestral instruments, such as harp, violin, viola, cello, trumpet, saxophone, trombone, clarinet, flugelhorn, French horn, tuba, English horn, oboe, flute, and piccolo.
