In this lesson series, we explore the key of C# Major and its relative minor key, A#, including their primary and secondary chords, as well as a selection of common chord progressions.
Main Category:Theory
Main Instrument:Any
6 August 2026
Key Signatures - C# Major
In this lesson series, we explore the key of C# Major and its relative minor key, A#, including their primary and secondary chords, as well as a selection of common chord progressions.
This cover the Key of C♯ Major and it's Relative Minor Key, A♯m.
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Key Signatures - C Sharp Major and A Sharp Minor
C# major (or C-sharp major) is a major scale based on C#, consisting of the pitches C#, D#, E#, F#, G#, A#, and B#. Its key signature has seven sharps: F#, C#, G#, D#, A#, E# and B# - ALL sharps.
Its relative minor is A# minor, and its parallel minor is C# minor. Its enharmonic equivalent is Db major.
2
Primary Chords - C# Major
The primary chords for any major key are the I, IV and V chords of its corresponding major scale. For C# Major, the primary chords are: C#, F#, G# and G#7.
From the primary and secondary chords of a major key, countless songs and chords progressions can be played.
3
Secondary Chords - C# Major
The secondary chords for any major key are the II, III and VI chords of its corresponding major scale. For C# Major, the secondary chords are: D#m, E#m and A#m.
From the primary and secondary chords of a major key, countless songs and chords progressions can be played.
4
Common Chord Progressions for the Key of C#
Common chord progressions for the key of C#. Using the primary and seconday chords for the key explore these common chord progressions for the key of C#.
