This is the song "Mille Regretz" of Josquin Desprez, a french composer :

Mille regretz de vous habandonner,
Et deslongiers vostre fache amoureuse,
Jay si grant doeul et paine doloreuse,
Quon my verra brief mes jours definer.

Now, you could listen the transcription of a 4 voices polyphonia, based on this song, which was made for vihuela by Luys de Narvaez (1538). This is one of my favourite piece.

I recorded myself because I don't want to infridge some legal right. So, it's my guitar mourns some desperated loves...

Romook, sometimes guitar player...