The cavaquinho is a small Portuguese string instrument in the European guitar family, with four wires or gut strings.
Portuguese and Brazilian cavaquinhos
A samba cavaco (right).
Two cavaquinhos in Cape Verde.
A modern ukulele.
In music, there are two common meanings for tuning:Tuning practice, the act of tuning an instrument or voice.
Tuning systems, the various systems of pitches used to tune an instrument, and their theoretical bases.
Man turning tuning pegs to tune guitar
Tuning of Sébastien Érard harp using Korg OT-120 Wide 8 Octave Orchestral Digital Tuner