The Baritone Saxophone, one of the more common members of the saxophone family, is used in modern ensembles. The Bari as it's often known, is tuned in the key of E-flat and stands in alongside the other three smaller yet popular members of the saxophone family, the alto, tenor and soprano saxophone. Music for the Baritone is written in treble clef with low B-flat range.
Some manufacturers have added a low A to the range, while others simply play to a low B-flat. This is an extremely heavy instrument, weighing around 6-7 kilograms, and consequently is difficult to use in compilations such as marching bands. The instrument is often held in a harness to even out the weight of the saxophone on the player's back, as opposed to around the neck like other saxophones. The baritone's reed is usually around twice the size of the alto saxophone. Popular in classical music more so than orchestral music, the Bari is the largest saxophone commonly used in modern pieces, along with the alto, tenor and soprano saxophones. The Bari Sax has been recognised as an important member in musical ensembles such as military, concert and jazz bands, as well as being common in the musical theatre, particularly in more jazz focused production.