Just for interest, I have a World Record Club LP (Harmonia Mundi recording) entitled "Music of the Bible Revealed" where organist, scholar, and composer, Suzanne Haik Vantoura, claims to have now deciphered an age-old notation, as laid down in the Hebraic Bible (Old Testament). 14 pieces (psalms, lamenations, etc.) are played and sung on this record.

Re the English stuff, I'd always thought that piece "Summer Is Icumen In, Loudly Sing Cuckoo" was from the 1100s or somesuch (I think it holds some kind of early claim-to-fame anyway ...
Cheers! R-J