Last week, Adele took umbrage with comments made by producer Tony Visconti.

Visconti - who was David Bowie's long-time producer, as well as working with everyone from T-Rex to Morrissey in the past - questioned the authenticity of Adele's voice in an interview, saying: "You turn the radio on and it's fluff, you are listening to 90 per cent computerized voices. 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."

In turn, Adele referenced the comments at one of her live shows, saying: "Some dickhead tried to say that my voice was not me on record. Suck my dick."

Now, Visconti has apologised for offending the singer, telling Billboard: "I'm sorry that what I said in regards to what's being played on radio was misconstrued yet I cannot apologize for something taken the wrong way. If Adele has taken my comments as offensive that was certainly not my intent."

"Adele has a great voice and it brings pleasure to millions."

So far, Adele has not responded.