 Horn
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The horn spans four plus octaves depending on the player and uses both the treble and bass clefs. In this chart it is assumed the player is using a double-horn with F and Bb sides. The number 1 indicates that the index-finger valve should be depressed, the number 2 indicates that the middle-finger valve should be depressed and the number 3 indicates that the ring-finger valve should be depressed. There are eight possible valve combinations among the first, second and third valves: 0, 1, 2, 3, 1-2, 1-3, 2-3, and 1-2-3. However, there are effectively seven combinations, because 1-2 will produce the same notes, perhaps slightly out of tune, as 3 alone. One depresses the thumb key to use the Bb side of the horn. Note that it can be difficult to listen for what note is being played.
