Transposing Instruments

musical instruments for which parts are notated higher or lower, by a fixed interval, than the actual notes produced by the instrument. Transposing instruments are generally wind instruments. Those with variants pitched in a variety of keys can be played in any key without changing the fingering or technique of sound production when the new instrument is substituted. Transposing instruments simplify notation by reducing the need for lines added to the staff or for accidentals.