Finger Positions

C#11/B diagram
Root Note C#
Name C# eleventh over B
Intervals 1P-5P-7m-9M-11P
Relative Minor A#m
Notes C#, G#, B, D#, F#
Aliases C#11

How to play the C#11/B Chord

The C#11/B is a fundamental dominant chord in guitar music. To play this chord correctly, ensure your fingers are placed precisely on the frets indicated in the diagram above.

Music Theory Analysis

From a theoretical perspective, the C# eleventh over B is built using the 1P, 5P, 7m, 9M, 11P intervals. In the key of C# Major, this chord functions as the I chord.

Common Progressions

In music composition, the C#11/B chord is often used to create tension or resolution.

I-V-vi-IV

C# → G# → A#m → F#

vi-IV-I-V

A#m → F# → C# → G#

The Diatonic Family

Understanding the "family" of chords that belong to C# helps with transposition and ear training.

Triads

C# D#m Fm F# G# A#m Cdim

7ths

C#maj7 D#m7 Fm7 F#maj7 G#7 A#m7 Cm7b5

Scale Compatibility

View All Scales
Minor Bebop Dorian Mixolydian Piongio Mixolydian B6 Bebop Minor Minor Bebop Composite Blues Chromatic

* 10 scales found containing the notes C#, G#, B, D#, F#.

Acoustic & Digital Analysis

Digital footprint of the C#11/B chord for MIDI programming and synthesizer sound design.

MIDI Numbers 61, 68, 71, 63, 66
Frequencies (Hz)

277.1826309768721, 415.3046975799451, 493.8833012561241, 311.1269837220809, 369.9944227116344