Diminished 7th slash chord
Level 4: Slash chords
Notes: C, E♭, G♭, A · Bass note: A · 4th Position
Also known as: Cdim7/A, Cdim7 over A, C diminished 7th over A, Cdim7 slash A
Fretting hand for left-handed players (your right hand), Cdim7/A. The numbers on the fingertips match the numbers on the chart.Fretting hand for right-handed players (your left hand), Cdim7/A. The numbers on the fingertips match the numbers on the chart.
- 1Index
- 2Middle
- 3Ring
- 4Pinky
- TThumb, behind the neck
How to play Cdim7/A
- Lay your first finger flat across every string from the D string to the B string at the fourth fret.
- Place your second finger on the fifth fret of the low E string.
- Place your third finger on the fifth fret of the G string.
- Strum from the low E string. Do not play the A and high E strings.
Tips for new players
- Keep your thumb behind the neck and let your fingers arch.
- Press just behind the fret, not on top of it, so every string rings clearly.
- Play the plain chord first, then this slash chord, and listen to how the new bass note changes the sound.
Chord video
Watch Cdim7/A, step by step
A short animation that builds the Cdim7/A chart and explains every symbol on it.
- X marks a string that is muted or not played.
- Open circle marks a string you play without fretting.
- Numbered dot marks a fretted string. The number is the finger to use.
Learn and practice Cdim7/A
Practice progression
Cdim7, Cdim7/A
Switch between Cdim7 and Cdim7/A until the changes feel smooth.