For example, the dominant seventh flat five chord built on G, commonly written as G7♭5, is composed of the pitches G–B–D♭–F: It can be represented by the integer notation {0, 4, 6, 10}.
That is, it has the same notes as the dominant seventh flat five chord a tritone away (although they may be spelled differently), so for instance, F♯7♭5 and C7♭5 are enharmonically equivalent.
In this sense, there are only six "unique" dominant seventh flat five chords.
In jazz harmony, the dominant seventh flat five may be considered an altered chord, created by lowering the fifth of a dominant seventh chord, and may use the whole-tone scale,[1] as may the augmented minor seventh chord, or the Lydian ♭7 mode,[2] as well as most of the modes of the Neapolitan major scale, such as the major Locrian scale, the leading whole-tone scale, and the Lydian minor scale.
Dominant seventh flat five chords for a guitar in standard tuning.