Most saxophone literature written for the concert stage in the latter half of the twentieth century until today includes passages into the extended register (above high F) or the altissimo register. This varies widely, from a single note or two just creeping slightly beyond F to extended sections that climb dizzying heights up to four octaves or more. Gone is the time in the history of the saxophone when it is acceptable to "trim" the register requirements of a significant work to fit the limitations of the performer. No serious violinist, flautist, or singer would dare walk onto a stage and take a section down an octave or just not play the last two notes of a cadenza! Nor should we.