Thanks a lot to everybody for your comments.
I'm the conductor (I do it for hobby) of a volunteer church choir, where the average age of singers is about 55, and I'm the only person who knows music; unfortunately I have only 4 baritones but no basses nor tenors: this often happen in volunteer church choir in Italy, at least on small choir on small churches that I know.
So I can tell that Siwi and J. Lee Graham fully understood my target. I was looking for a 3 voices (SABr) Mass for my choir, but it was hard to find it, so I decided to write it. This was one of my dreams since many years. The Mass should be in Italian (we already perform a 3 voices Mass in Latin, we needed a new one), easy to learn, sing and listen, and also easy to play on the organ while conducting (I have to do both things on the same time).
This Mass required us about 10-12 practice sessions to be studied before to be performed the first time (we started to study the first piece before I wrote the Gloria, that has been the last to be written...): this I think has been a great job and I have to thank my singers for that (I know, professional choir could perform it at the first view, but it's not our case...).
The Santo is a easier version of the Santo I wrote many years ago for another choir, and where time signature are very different. You can find it here on my music if you want.
Parallel motion between parts on Signore Pietà (Kyrie) and Agnello di Dio (Agnus Dei) is an experimentation I would try, as I did in the Ave Vera Virginitas (you can find it too, here on my music, if you want: C. Bosco is... me )
I know that The Second Vatican Council asked to choirs to be a guide for congregation while singing, but it's not so easy to apply, because often when the choir is singing congregation usually prefers to listen, and also because choir's singers would perform other musics, not the “usual songs”.
Tiberio
p.s.: please sorry for some mistakes you could find in my written English...
