I can't say it was entirely successful. The song needs to be clear and preferably with no other calls going on at the same time but I got one or two good recordings which I know were right as I could see the bird!
Interestingly I kept getting a 30-40% on Nightingales which, although I'd love it to be so, I'm pretty sure we haven't got even in the trees beyond the garden. The song thrush was going up and down the scales though so wonder if they are similar?
So I think it needs trying out a bit more before I can be confident it's giving me the right answer.