Just thought I would post this as it may help others.
The following is open to a bit of debate as dh/ dds dad is a reknowned professional musician and music has been part of her culture from before birth.
However, dd very late to talk, no mumma, dadda and then one day aged three a complete sentence quite complex too. She went for therapy, had ears tested and the therapist asked about noises she had made if any. It then dawned on me that dd was always humming and could repeat perfectly the dawn chorus and background noises with perfect pitch. She was assessed by therapist who declared her g&t in music. I laughed really as both me and dh whilst encouraging music don't really go down the taking grades route. But at 9 she has aprox grade 5 standard on 4 instruments. Obviously including voice. I don't mean to boast but I know what its like to worry over a childs late speech development.