A portable electronic stringed instrument is disclosed. The folding instrument includes a neck portion and a body portion and a connection portion for connecting the neck portion to the body portion. A plurality of adjustable neck strings are disposed between a nut and a neck bridge on the neck portion and a plurality of adjustable body strings are disposed between a nut and a body bridge on the body portion. A finger placement sensor array is disposed on the neck portion proximate the frets and the neck strings. A string vibration sensor is disposed on the body portion proximate the body strings. Although the approximate length of the neck portion can be about 8 to about 12 inches, the fret board on the neck portion includes a plurality of frets that are precisely spaced to provide the fret spacing of a standard, 25.6- to 26-inch "scale length" acoustical guitar.