The term "home note" is used only to indicate that this note is the most convenient reference point of the scale since it matches the root of the chord over which it is used. It should be stressed here that neither the lydian dominant scale nor the altered scale has a tonic triad on its home note, because that is the root of the (unstable) dominant chord over which it is used. They are all taken from the same melodic scale ( c, d, e, f, g, a, b) and the name of each scale is listed next to its home note. These two jazz modes and the two tonal harmonic scales are listed below.
These two modes are usually called the lydian dominant scale and altered scale. Two of the other modes of this scale are very familiar in jazz circles as melodic modes used as the basis for improvisation (or indeed composition) over dominant seventh type chords. The two tonal scales which can be derived from it are, however, amongst the least effective and convincing at providing a tonic of all the tonal This makes the scale particularly suitable for melodic purposes, including improvisation.
The melodic scale is proper, and, like the diatonic scale, it is smooth with only two sizes of second (major and minor second). The melodic scale can be represented by these notes: c, d, e, f, g, a, b.
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