What is the function of the alto clef in music?

The alto clef serves a specific purpose in music notation by indicating the pitch range for the viola, as well as for certain other instruments and voice types that fall within the same range. Unlike treble or bass clefs, which are commonly used for high and low voices or instruments respectively, the alto clef centers around middle C on the third line of the staff. This positioning makes it particularly suitable for instruments like the viola, where notation is more practical and legible without excessive use of ledger lines.

In contrast, other instruments that might use different clefs, such as brass instruments or transposing instruments, do not typically make use of the alto clef for their standard notation. The decorative aspect mentioned does not pertain to the functional role of the alto clef in musical music. Thus, the correct understanding of the alto clef is fundamental for players of the viola and those who read music within that specific pitch range.