Viola
Instruments
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The viola is a string instrument that is usually bowed. Slightly larger than a violin, it has a lower and deeper sound. Since the 18th century, it has been the middle or alto voice of the violin family, between the violin and the cello. The... Wikipedia
Clef: alto clef
Hornbostel–Sachs classification: 321.322–71; (Composite chordophone sounded by a bow)
Other names: French: alto; German: Bratsche; Portuguese: Viola d'arco