Chords in the key of C# minor on cavaquinho
The key of C# minor has seven diatonic chords: C#mC#mC#mC#m, D#°, E, F#mF#mF#mF#m, G#mG#mG#mG#m, A and B. As sevenths: C#m7C#m7C#m7C#m7, D#m7b5, Emaj7Emaj7Emaj7Emaj7, F#m7F#m7F#m7F#m7, G#m7G#m7G#m7G#m7, Amaj7Amaj7Amaj7Amaj7 and B7B7B7B7. They come from the C# natural minor scale, C#, D#, E, F#, G#, A and B, one on each note. On cavaquinho, the shapes below are the seventh chords of every degree, and the tonic one has E in the bass.
On the cavaquinho, four steel strings tuned D–G–B–D pack the chord into a small, bright space — every finger counts. Its four steel strings give a bright, sharp attack that cuts through the mix and drives the beat.
Seventh chords in C# minor on cavaquinho
These are the chords of the natural minor scale. In practice the v often becomes V (major) or V7, borrowed from the harmonic minor, to create the leading tone that pulls back to the tonic.