C#/D# — with the ninth in the bass
Also written Db/Eb — the same chord, spelled the other way.
Notes in C#/D#: D# – C# – E# – G#Formula: 1 – 3 – 5 / 9In the formula, the numbers count steps of the major scale starting from the note that names the chord; "b" lowers a half step, "#" raises one — and a slash names the bass note.
The C triad over a D bass. Heard from the bottom up it is a suspended chord — a D with a fourth and a seventh, no third: open, and saying nothing about major or minor.
The same chord on all four instruments
Where to use it: Right before the resolving chord, in gospel, pop and keyboard fills.
This is just one shape of C#/D#. In Chord & Fret, you check it note by note, playing any shape as an arpeggio; compare positions with their difficulty marked; and change the tuning — the shape rewrites itself. Start free. Unlock everything with Pro. Plays offline.
See the whole neck in Chord & Fret →Part of the Inversions (slash) family.