Chant

[Mandryka]

I think (Choral-)Schola's originally were male groups exclusively, and that women haven't participated until quite recently. This quote from WIKI seems to confirm that:

A Choralschola, known simply as schola, is a choir for singing Gregorian chant or plainsong. It consists traditionally of only men, but more recent groups sometimes also include female voices.

https://en.wikipedia.org/wiki/Choralschola

I'm sure, when I heard lady's voices on the CD I didn't like above, the one from Pontigny,  it was in polyphonic music I think. However, it would be interesting to hear that LP to see what the women do.

[Mandryka]

Notker Balbulus on Naxos -- this is beautiful, perfect.

[Mandryka]

Fulbert de Chartres, Venace Fortunat. Of course, I never know how much is in the score and how much is embellishment by the singers - but whatever, it really is magical stuff. 1000 years old, and still fresh, still exciting.

This thread puts it inimitably and perfectly

 https://www.good-music-guide.com/community/index.php/topic,29282.msg1247136.html#msg1247136