What is the G7b5 Chord?
Here's a fretboard view of the G7b5 chord so you can see where each chord tone lives across the neck.
Notes and Arpeggios
The 7b5 chord lowers the 5th of a dominant 7th, loading it with tritone tension. It's an angular, restless sound used in jazz for chromatic movement and tritone substitutions. The complete chord tones are: G, B, Db, F. The complete formula is 1, 3, b5, and b7.
How to Use It
You'll mostly hear altered dominants in jazz turnarounds and tense lead-in chords before a resolution. On bass, outline the harmony one note at a time. Start from the root and add the chord's actual degrees (3, b5, and b7) as the arrangement allows. The chord-tone boxes locate notes; the ordered arpeggio gives a playable route with explicit position shifts.
Connect this chord to the next harmony using nearby chord tones. Shift the hand when the line needs it rather than stretching beyond a comfortable position. Use the highlights to spot where the same tone repeats across strings.