My friend majored in music in college, and she had to sing a couple of madrigals with other students. When she described them to me, it all sounded very intriguing, so I decided to come to her performance.
The style of singing was unlike any I had ever heard. There was a lot going on within the song, and how the individual singers kept their parts straight is a mystery to me. It must have required a lot of focus and a ton of practice.
I think that a singer could not afford to get nervous during a madrigal performance, because any little distraction could ruin the whole thing. All of the student singers were very polished and prepared, and I really enjoyed their performance.