Brothers of Kappa Kappa Psi are not restricted from joining Phi Mu Alpha Sinfonia or Sigma Alpha Iota, except by the gender restrictions or other eligibility requirements of either organization. Joint statements between Kappa Kappa Psi and Phi Mu Alpha Sinfonia have affirmed this since at least 1973, and have been reaffirmed as recently as 2005, when the organizations released a joint statement saying, "there are equally important roles for Phi Mu Alpha Sinfonia, Sigma Alpha Iota, Kappa Kappa Psi and Tau Beta Sigma to fulfill on any campus where our chapters mutually exist, now or in the future. Each organization possesses a distinct mission and, as a result, fulfills a unique and vital role in the musical environment of a college campus." Indeed, founder Raymond Shannon went on to join Phi Mu Alpha Sinfonia after starting Kappa Kappa Psi.