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The alto clef is mainly used by the viola.

Grade 4 - Alto Clef

Meet the alto clef. Learn how the C-clef works, where middle C sits, and quick tips for reading viola parts confidently.

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Fascinating Fact:

Viola open strings map neatly: G sits in the bottom space, D in the third space, A in the space above the top line.

In Specialist Music Theory (Grade 4), the alto clef is a C-clef placing middle C on the middle line. It’s the viola’s home clef, so mastering its landmarks makes sight-reading clear and fast.

Key Terms

Alto Clef (C-clef): A clef that puts middle C on the third line; used mainly by viola.
Middle C (in Alto): The note on the middle (third) line—your best starting landmark.
Reference Notes: Helpful anchors such as viola open strings: G (bottom space), D (third space), A (space above top line).

Frequently Asked Questions (Click to see answers)

What is the alto clef used for?

The alto clef is a C-clef with middle C on the third line. It’s used mainly by the viola, and sometimes by alto trombone in certain repertoire.

How do I find middle C in alto clef?

In alto clef, middle C sits on the middle (third) line of the stave. From there, D is the third space, B is the second line, and so on.

What’s the quickest way to learn alto clef reading?

Memorise landmarks: the C line, viola open strings, and a few scale shapes. Practise short lines daily to build instant recognition without converting from other clefs.