Bb7-5 altered chord

Altered Bb chord for piano presented by keyboard diagrams.
Explanation: The Bb7-5 alter the Bb7 by the change of one note. Bb7-5 stands for B flat seven minus five.
Theory: The Bb7-5 are identical with the Bb7 except that the fifth tone of the scale (i.e. the third tone in the chord) is flattened.
Fingerings: little finger, middle finger, index finger, thumb (left hand); thumb, index finger, middle finger, little finger (right hand).

Bb7-5

Bb7-5 chord diagram
Notes: Bb - D - E - Ab

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Bb chord categories

Bb Bbm Bb7 Bbm7 Bbmaj7 Bb6 Bbm6 Bb6/9 Bb5 Bb9 Bbm9 Bbmaj9 Bb11 Bb13 Bbadd Bb7-5 Bb7+5 Bbsus Bbdim Bbaug