Variation is a form that is an altered version of a given theme, diverging from it by melodic ornamentation and by changes in harmony, rhythm, or key.
Variation, sheet music:
VARIATIONS on a Scottish Theme (Mikhail Glinka)
VARIATIONS on Alyabyev’s Song “THE NIGHTINGALE” (Mikhail Glinka)
VARIATIONS on a Russian Theme (Mikhail Glinka)
VARIATIONS ON A RUSSIAN SONG (Isaak Yakovich Berkovich)
VARIATIONS on the theme of the Belarusian folk song PEREPELOCHKA (Isaak Yakovich Berkovich)
VARIATION on the theme of Russian folk song (Nikolai Lyubarsky)
THEME AND VARIATIONS, Op.19, No.6 (Pyotr Ilyich Tchaikovsky)
VARIATIONS in D minor (Isaak Yakovich Berkovich)
VARIATIONS on the Russian song THE COW (KOROVUSHKA) (Isaak Yakovich Berkovich)
VARIATIONS on the Ukrainian theme (Isaak Yakovich Berkovich)
Air with Variations in F major (George Frideric Handel)