The ensemble performing was called "Douce Memoire" which means Sweet Memory, and a sweet memory it was. Though I didn't see the actual concert, because I was in charge of keeping watch of the dressing rooms and helping with the reception, what I heard was good. The group performs with musical instruments from the Medieval and the Baroque period, about 10 instrumentalists and 6 singers (2 women and 4 men).
The concert was in memory of Henri IV's death and was influenced by the queens and kings of the court. Therefore, when the music started it was reminscent of the sounds one would hear in the 16th century. It made me want to process down the walkway like a princess, "Now presenting Princess Adrienne of Drancy"!
The main instruments used were recorders, bassons, a small pump with your feet type organ and a cross-between a trumpet and a cornette. The trumpet cornette sounded like a flute but it wasn't, I asked one of the woman playing these instruments to describe it and she said there was no relation with the flute.
The music echoed throughout the Basilica and echoed into the courtyard of the church as if angels were sending the music into the ears of the crowd. The only disappointment was the music and the echo did not stay in rhythm, this coming from a musician. But I guess not everything can be perfect.
This ensemble and their concert were great, the women's voices harmonized well and one could see that they loved singing as there was a sort of glitter in their eyes. The men were so enthusiastic when singing, they would just sort of jump right in, when it was their turn to add the harmony to the fugue.
And the instruments, one thing I could never forget... harmonized and sweet melodies never making a mistake, thus creating sweet melodies.