Another Hyperion title featuring the Gothic Voices is: "The Spirits of England and France" (Hyperion CDA66783). This one features the works of Gilles Binchois and his contemporaries of the 14th and 15th centuries. A 1995 recording, with very good sonics and surreal, airy music.
Medieval-style music
I'm trying to find good recordings of medieval-style music (not necessarily historically informed), based on music from Spain, France, etc. XI-XIV ages. I liked Les Jongleurs de la Mandragore from Quebec, and some recordings from Dorian, even Azam Ali. Can anyone recommend anything else? My system is... too revealing, so the recording quality is critical.