Every chord tone can be played one or more octaves higher or even lower than the root on the guitar. C7/E, C7/G and C7/Bb are inversions of the chord. It's also possible to use the 7th chord as the dominant of other chords. Jazz Chord Phrase 2. This outlines the b7-3-b13-b9 of the C7alt chord. Chord tones may occur more than one time in your chord shape. It is also possible to place the thumb on the sixth string and use 332310 instead. For example, the basic E chord would be described as 022100. Jazz Chord Phrase 3 Here you play a m7b5 chord from the b7 of the underlying chord. Dm7 - C7 - Bb - F. Chord names. C7 is a dominant chord. For alternate fingerings, click on the chord diagram. In this chord, the first string can be omitted. 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”. Try in a chord progression. C7alt chord diagram. That too doesn't change the chord name. Concerning the pictured C7/G, the index finger should touch the 5th string slightly. 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. ... Altered chord: C7alt C7(b9) C(b9,b13) C7(#9) etc... 1 3 7 (b9, #9, #11, b13) 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. For example, in A# major, we could use C7 as the "dominant of the dominant". In this minor key ii-V-I, you use a common chord substitution over 7alt chords.