I usually don’t put things up on the site before my group has played them, but I promised this to someone who might need it next week, and we can’t play it until the week after next, so here it is. Let me know if there are any problems.
An In Nomine is a four or more part piece where one of the middle lines is playing the In Nomine chant tune in very long note values, and all the other parts are playing highly decorated and often rhythmically complex parts in short note values.
In Nomine‘s are great if you have a mixed group — if you have one person who can’t play as fast as the other people, they can play the In Nomine line, and if you have one very advanced person in the middle of a bunch of players who are high on being able to play rhythmically complex stuff, they can play the In Nomine line and work on their breath control. In our group, the serpent usually grabs that line.
Probably for at least some of those reasons, lots of great 16th and 17th century English composers wrote at least one; here’s one by Orlando Gibbons.
LayMusic.org 