Some additional thoughts
It could've easily been music from the African continent. I don't think it was a program feed error as I've never heard this before on any station, but it doesn't mean they cant do something new.
Its not turkey, it sounded too crisp and clear to be them. I doubt it's the Vatican. It sounded like a test of some sort. The signal behaved kind of skywave-y.. like, it was pretty decently strong, but it wasnt "paul is in the target area strong" but it was a solid listen.
In my 7-8 years of scanning the SW bands, I've caught several test transmissions to find a problem in the transmission, tests for future broadcasts and clandestine stuff
And unless they've changed things, this isn't the same music they use during "fault finding" with the Wooferton HF transmitters
What did I hear?