Title Music Sounds Different When Using the Playsound Command

The title screen music is actually a set of music pieces, that's randomly selected.

If this is not what you meant, please properly explain the issue.

Please try to play the title music using the playsound command in the game. Copy this down:
/playsound minecraft:music.menu player @s 10000 2 1

/playsound minecraft:music.menu master @s ~ ~ ~ 1.0 1.0 1.0 sounds as expected for me...
are you changing the pitch? (that'd be the second '1.0' in the above command)

Edit: change it to 2.0 for a faster/higher pitch version of the song

Okay

It sounds as if it were changed to match the Update Aquatic, but it doesn't appear on the title screen.

Changing it to 2.0 does get the effect that i'm talking about, but why doesn't it play on the title screen?

Technically wouldn't these songs count as new music.