G Diminished Scale

What is the G Diminished Scale?

The diminished (whole-half) scale alternates whole steps and half steps across eight notes, creating a symmetrical pattern that repeats identically every minor 3rd. This symmetry means there are really only three unique diminished scales, and they're essential for navigating diminished chord passages in jazz, classical, and progressive music. Here's how the G Diminished Scale lays out on the fretboard.

Notes and Positions

Symmetrical scale alternating whole and half steps. On bass, this scale becomes a toolkit for strong roots, passing tones, and melodic fills that still support the groove. Think in root-on-E and root-on-A boxes, then adapt the same notes for 5-string bass when the low B string gives you another root below the pattern. In the key of G, the notes are: G, A, Bb, C, Db, Eb, E, F#.

How to Use It

You'll often hear it in Jazz, Metal, and Classical. A good way to internalize the sound is to sing the root, then sing a few scale degrees before you play them.

Build two-bar bass lines that return to the root before experimenting with wider melodic movement. Use the interactive fretboard above to spot repeats of the same note on different strings and frets.