Girl With A Musical Instrument

• Schaeffner
Andre Schaeffner, a curator at the Musée de l'Homme, disagreed with the Hornbostel-Sachs system and developed his own system in 1932. Schaeffner believed that the pure physics of a musical instrument, rather than its specific construction or playing method, should always determine its classification. (Hornbostel-Sachs, for example, divide aerophones on the basis of sound production, but membranophones on the basis of the shape of the instrument). His system divided instruments into two categories: instruments with solid, vibrating bodies and instruments containing vibrating air.
• Range
Western instruments are also often classified by their musical range in comparison with other instruments in the same family. These terms are named after singing voice classifications: