0:00 12 equal temperament
2:06 Kirnberger Ⅲ
4:13 P.C.1/6 Meantone
6:20 Rameau's modified meantone, interprited by Kuwagata ♭type 2009
8:26 S.C.1/4 Meantone
10:33 S.C.2/7 Meantone

Composed and arranged for piano by：
Пётр Ильич Чайковский, Peter Ilyich Tchaikovsky ( 1840 - 1893 )
　
　
Piano performance data production：S.P.ORCHESTRA M-Musica
　
　
Software sound source：IvoryⅡ American Concert D
https://synthogy.com/index.php/products/software-products/ivory-2-american-concert-d
　
Mixdown：Stinburg Cubase Elements 10
https://new.steinberg.net/
　
Video Editing：Loilo Scope
https://loilo.tv/
　
　
Around 1891, when The Nutcracker was composed, it is generally believed that the 12 equal temperament was quite popular. However, a study of ballet music and music for ballroom dancing shows that there are many pieces for which "Meantone" or "Modified Meantone" fits well.