Solange Knowles wants to release a record of tuba tunes. The 37-year-old Grammy winning sister of Beyoncé, 42, said she has learned to play the brass instrument and has been writing music specifically for it – but doubts her fans would appreciate an album of her efforts. She told the new issue of Harper’s Bazaar magazine: “I love it. I’ve started writing music for the tuba, and I am trying to talk myself into releasing it, but I can only imagine the eye rolls from people being like, ‘This (girl) hasn’t made an album.’” Solange, whose last album ‘When I Get Home’ was released in 2019, also said…