Horn arrangements have been used on songs from all Steely Dan albums. They typically feature instruments such as trumpets, trombones and saxophones, although they have also used other instruments such as flutes and clarinets. The horn parts occasionally integrate simple synth lines to alter the tone quality of individual horn lines; for example in "Deacon Blues" this was done to "thicken" one of the saxophone lines. On their earlier albums Steely Dan featured guest arrangers and on their later albums the arrangement work is credited to Fagen.