John Francis Anthony "Jaco" Pastorius III (1951–1987) was a U.S. jazz musician and composer widely acknowledged for his skills as an electric bass player, as well as his command of varied musical styles including jazz, jazz fusion, funk, and jazz-funk. His playing style was noteworthy for containing intricate solos in the higher register. His innovations also included the use of harmonics and the "singing" quality of his melodies on fretless bass. - Regularly notated notes are harmonics - Fretted notes are notated as n* - 3+ means harmonic played at approx. 0.25 of the distance 3rd-4th fret above the 3rd fret (find out on your own instrument at which position the harmonic is at it's loudest). - 2++ means harmonic played halfway between the 2nd and 3rd fret - 2&6 means push 2nd position down to fret (index finger) and play harmonic at 6th position (little finger).