http://www.w3.org/ns/prov#value | - Other instruments, such as the clarinet and French horn, do not produce a concert C when playing a C. The most common clarinet produces a concert Bb (it is called a Bb-clarinet), while a horn produces a concert F. Since the system assumes a concert or C scale it would identify a C played on a clarinet as a Bb, which is correct but may be confusing to the user.
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