Majestic. I really wasn't very engaged with music until I became a Christian in 2016. Then I came to realize the meaning of:
Psa_40:3 And he hath put a new song in my mouth, even praise unto our God: many shall see it, and fear, and shall trust in the LORD.
Actually the concept of a "new song" is all over Scripture. I don't think there will ever be an end to psalms, hymns, and spiritual songs.
Heaven's choir will really be something, with more than ten thousand times ten thousand and thousands of thousands singing at once.