One would think that saxophonist Darren Rahn would need a rolodex just to keep account of all of the hats that he has worn playing the roles of solo artist, composer, arranger, multi-instrumentalist, music programmer, and his latest addition, a member of Nu Groove Records smooth R&B/soul group, De’Nate’, fronted by keyboardist/programmer Nate Harasim and the beautiful siren Deborah Connors on lead vocals. Rahn stepped forward as a solo artist in 2007 with the release of his debut record, …