Minor scale based on the accidentals of the "natural" minor scale, not on those of the harmonic or melodic minor scales. For example, a piece in E minor will have one sharp in its key signature because the E natural minor scale has one sharp (F). Major and minor keys that share the same key signature are "relative" to each other. For instance, F major is the relative major of D minor since both have key signatures with one flat. Since the natural minor scale is built on the 6th degree of the major scale, the tonic of the relative minor is
Pentatonic scale traditions: Examples of its use include Chopin's Etude in G-flat major, op. 10, no. 5, the "Black Key" etude, in the major pentatonic. Musicology commonly classifies pentatonic scales as either "hemitonic" or "anhemitonic". Hemitonic scales contain one or more semitones and anhemitonic scales do not contain semitones. (For example, in Japanese music the anhemitonic "yo" scale is contrasted with the hemitonic "in" scale.) Hemitonic pentatonic scales are also called "ditonic scales", because the largest interval in them is the ditone (e.g., in the scale C–E–F–G–B–C, the interval found between C–E and G–B). This should not be confused with the identical