How do you play the F# maj7(b5)/C## chord?

To play the F# maj7(b5)/C## chord on piano, play the F# maj7(b5) chord (F#, A#, C and E#) with C## as the lowest bass note. Place the C## note below the other chord tones. Slash chords specify a particular bass note different from the chord root.

What is a slash chord?

A slash chord (or compound chord) is written as Chord/Bass and specifies both a chord and a bass note. The note to the right of the slash is played as the lowest note. The F# maj7(b5)/C## chord means a F# maj7(b5) chord with C## in the bass.

F# maj7(b5)/C##

Q: What notes are in the F# maj7(b5)/C## chord?

The F# maj7(b5)/C## chord uses the 4 notes of the F# maj7(b5) chord — F# (Perfect unison), A# (Major third), C (Diminished fifth) and E# (Major seventh) — with C## played as the bass note in the lowest register.

The F# maj7(b5) chord consists of the F# (Perfect unison), A# (Major third), C (Diminished fifth) and E# (Major seventh) notes, with C## as the bass note.

Piano keyboard showing the notes for a F# maj7(b5)/C## chord

How to play the F# maj7(b5)/C## chord

Play C## as the lowest bass note in the left hand
Find F# (Root) on the piano keyboard
Add A# (Major third) — 4 semitones above F#
Add C (Diminished fifth) — 6 semitones above F#
Add E# (Major seventh) — 11 semitones above F#
Press all 5 notes simultaneously to sound the F# maj7(b5)/C## chord

Inversions with same root

D 7(alt)

Related slash chords

C 11(b5)(sus4)/D