David Bowie's producer, Tony Visconti said that Adele's "great voice" could have been "manipulated", in a recent interview. "You turn the radio on and it's fluff, you are listening to 90% computerised voices," the 72-year-old told the Daily Star. "We know Adele has a great voice but it's even questionable if that is actually her voice or how much has been manipulated. We don't know."