"C# Major" (or the key of C#) is a major scale based on C#, with the pitches, all sharps C# D# ES F# G# A#. Its key signature has seven sharps: F# C# G# D# A# E# B#. Its Relative Minor scale is A# Minor. Its Parallel Minor is C# Minor, and its enharmonic equivalent is Db minor. C# is a somewhat easy key and scale to memorize as all the note are sharp.

Major and Minor Harmonized Chord Charts are used for while doing a Harmonic Analysis (HA). Shows triads and 4-part chords for ALL 15 major and minor keys. "Yes, Virginia there are 15 keys."

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#.

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.

Harmonic Analysis is the understanding of the functional sequence of chords. It is the process used to analyze the harmonic structure of a progression, song or composition. This analysis is then used to make scale selections for improvisation and chord substitution.