Learn › C#sus2 Chord on Piano (C Sharp Suspended 2nd)
New Released in April 2026
C#sus2 Chord on Piano (C Sharp Suspended 2nd)
The C sharp suspended 2nd chord (C#sus2) uses the piano keys C#, D# and G#: the major triad C# with its third E# swapped for the 2nd, D#. Its sound: airy and modern, with no third to say major or minor.
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- MIDI keyboard
- Digital or acoustic piano
- Guitar
- Computer, phone or tablet
The chord hiding inside C#sus2
C#sus2 and G#sus4 are the same three notes. Stack them from C# and you read C#sus2; start from G# and the same keys read G#sus4. The bass note decides the name.
Building C#sus2 from C#
Start from C#, which you may already know, and change one thing: lower the third E# one whole step to D#.
Start chord: C#
| Note | Step | Interval | Keys from C# |
|---|---|---|---|
| C# | 1 | root | 0 |
| D# | 2 | major 2nd | 2 |
| G# | 5 | perfect 5th | 7 |
Ways to place C#sus2 on the keys
Each picture is still C#sus2. Move only the notes that must move.
Root position: C# D# G#
1st inversion: D# G# C#
2nd inversion: G# C# D#
Hands and fingers
| Right hand | C# D# G# | 1 2 5 |
|---|---|---|
| Left hand | C# D# G# | 5 4 1 |
Practise C#sus2 in four steps
- Say the notes out loud while you press them: C#, D# and G#.
- Switch between C# and C#sus2 ten times without looking at your hand.
- Alternate root position and 1st inversion, keeping shared notes still.
- Then test it in random order among other chords: recall under time pressure is what sticks.
Keep each session short and frequent and C#sus2 will become automatic.
When to play C#sus2
- C#sus2 works in the keys where C# already lives: C# major, Ab major (as Db) and F# major.
- It often comes back to C# or slides to C#m, because without a third it can lean either way.
Play C#sus2 in a game
In ChordRunner every correct chord moves your runner forward. Plug in a MIDI keyboard or let the microphone listen to your piano. Suspended chords have their own level, "Suspended (sus2/sus4)".
Play the demoCommon questions
What notes are in the C#sus2 chord?
C#sus2 has 3 notes: C#, D# and G#. Formula 1 2 5.
Is C#sus2 the same as G#sus4?
Same keys, yes: C#sus2 and G#sus4 contain C#, D# and G#. The name follows the bass note, C# for C#sus2 and G# for G#sus4.
Where is C#sus2 used?
C#sus2 works in the keys where C# already lives: C# major, Ab major (as Db) and F# major. It often comes back to C# or slides to C#m, because without a third it can lean either way.
Can I practise C#sus2 with a MIDI keyboard or a real piano?
Yes. In ChordRunner a USB MIDI keyboard is detected automatically, and an acoustic or digital piano works through the microphone. The game checks that C#, D# and G# sound together.
Your instrument is the controller.
ChordRunner is a browser game that teaches piano and guitar chords: a chord appears on screen, you play it on a real instrument, and your runner jumps. MIDI keyboard or microphone, both work.
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