Jazz Chord Phrase 3 C7/E, C7/G and C7/Bb are inversions of the chord. This outlines the b7-3-b13-b9 of the C7alt chord. It means specifically a dominant 7th chord containing the alterations from the “altered” scale, which also goes by the names “diminished/whole tone”, “superlocrian” and “seventh mode of melodic minor”. It's also possible to use the 7th chord as the dominant of other chords. For example, in A# major, we could use C7 as the "dominant of the dominant". That too doesn't change the chord name. In this chord, the first string can be omitted. Concerning the pictured C7/G, the index finger should touch the 5th string slightly. For alternate fingerings, click on the chord diagram. ... Altered chord: C7alt C7(b9) C(b9,b13) C7(#9) etc... 1 3 7 (b9, #9, #11, b13) Dm7 - C7 - Bb - F. Chord names. Jazz Chord Phrase 2. Try in a chord progression. C7 is a dominant chord. The notes of the C7 lead to F, which itself can then lead as a Dominant chord back to the tonic A#. This means that for Gm7b5-C7alt you play Gm7b5-Bbm7b5. Here you play a m7b5 chord from the b7 of the underlying chord. Chord tones may occur more than one time in your chord shape. C7alt chord diagram. The numbers represent the six strings of a guitar, the one on the left being the lowest tone, theone on the right being the highest. Every chord tone can be played one or more octaves higher or even lower than the root on the guitar. For example, the basic E chord would be described as 022100. It is also possible to place the thumb on the sixth string and use 332310 instead. In this minor key ii-V-I, you use a common chord substitution over 7alt chords.