 In an interview in 2004, she denied that "my terrible habits" had anything to do with her more limited range and pointed out that singers often lose the upper register when they pass fifty.In addition, she contended that in her opinion her voice became a more interesting and expressive alto range when she could no longer hit the high notes, let alone hold them like she did in her youth.The singer's next two albums featured no new songs and, Mitchell has said, were recorded to "fulfill contractual obligations", but on both she attempted to make use of her new vocal range in interpreting familiar material.