Exceptions are some diatonic instruments, such as the harmonica and tin whistle, which essentially play only one scale. A harmonica player or whistle player typically owns several instruments in different keys, and will choose one to match the song being played. A "D harmonica" or "D whistle" plays the D major scale, but they are not "in the key of D" in the manner of the previous paragraph. In fact the "D whistle", which is the most common type of tin whistle, would be said to be "in the key of C" by the logic of the previous paragraph, but this phrase is not used. (The note produced with six fingers down is D, matching the C flute, C oboe, and C saxophone.) The D whistle and the D harmonica play the D major scale but are not "in the key of D."