 After this, while Hendrix took a break to record "", Jacob mixed sound for Simon and Garfunkel for three dates in Oregon in October 1967.The next month, Monck flew Jacob to New York City to meet Peter, Paul and Mary, who did not need a new sound system, as they owned one already, but needed someone with good ears to mix their shows.Jacob accepted the assignment and mixed their concerts from 1968 to 1970.