Finger Positions

C#13/B diagram
Root Note C#
Name C# dominant thirteenth over B
Intervals 1P-3M-5P-7m-9M-13M
Relative Minor A#m
Notes C#, F, G#, B, D#, A#
Aliases C#13

How to play the C#13/B Chord

The C#13/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# dominant thirteenth over B is built using the 1P, 3M, 5P, 7m, 9M, 13M intervals. In the key of C# Major, this chord functions as the I chord.

Common Progressions

In music composition, the C#13/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
Bebop Mixolydian Lydian Dominant Bebop Minor Composite Blues Chromatic

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

Acoustic & Digital Analysis

Digital footprint of the C#13/B chord for MIDI programming and synthesizer sound design.

MIDI Numbers 61, 65, 68, 71, 63, 70
Frequencies (Hz)

277.1826309768721, 349.2282314330039, 415.3046975799451, 493.8833012561241, 311.1269837220809, 466.1637615180899