Few will have heard of a transposing instrument, though those who are very involved with music will be familiar with it. A transposing instrument is one that has special music written for it that is at a different pitch than the concert pitch. So, when other music that is written at the concert pitch reads a C, the transposing instrument music will show a different note.Instruments, like the celesta, that are referred to as transposing instruments will play the special music. The difference is not really in the instrument, it is just that the sheet music that is written will read differently than it does for the other instruments involved in the piece.One might wonder why there would be use for a transposing instrument. Transposition at the octave is one reason for having a transposing instrument. Some instruments are too high or too low to write in for a particular piece of music, so to limit the ledger lines used, someone might instead write the part an octave higher or lower for the piece. If there is a musical piece that is using a number of instruments from the same family, a transposing instrument might be