Tuesday, March 15, 2016

Change an Alto Staff to a Treble Staff

Reading both alto clef and treble clef improves your musicianship and increases your ability to read music written for other instruments such as the viola. The most common orchestral instrument that uses the alto clef is the violist; however, English horn and trombone players sometimes use the alto clef as well. Practically speaking, the alto clef can reduce the number of ledger lines in a part or score. This results in greater clarity and readability for the performer.

Alto clef is essentially a C clef that indicates the where middle C falls on the staff.

To begin your transposition, first identify where middle C falls on the alto clef staff. Unlike treble clef, where middle C appears on the first ledger line below the staff, the middle C on an alto clef staff appears on the third staff line in the middle of the 5-line staff system.

Once you identify the position of middle C, change the alto clef notes to treble clef notes by adjusting the pitches accordingly. The lines of the alto clef staff are F, A, C, E, and then G on the fifth line. Moving from bottom to top the spaces are G, B, D, and F. Once you know the names of the pitches, write the alto clef part in treble clef by identifying the note name on the alto clef part. Then, write the pitches one octave lower on the treble clef staff. Following this process, a C in the middle of the alto clef staff becomes a C directly below the treble clef staff.

An easy way to change notes involves ignoring the alto clef and just pretending all of the notes are in treble clef, but one note too low. Then, just transpose the notes down an octave. As an example, any note on the third line of the alto clef looks like a B in the treble clef, but is actually a C that is played one octave lower. To accurately transpose from alto to treble clef, you need to transpose the pitch up by one note and then transpose it down an octave to middle C.