Go to Single Player - Master -
Practice - Aria - Any opponent
Now you want to pause the game by pushing
then hit
until you are at Practice Options. Now you want to go to Instinct Meter and change that setting to Infinite.
Now to quickly explain Aria. She has 3 different body mods in which she can change (Bass Body, Booster Body, Blade Body) which you can see up the top right of the screen. The way you switch body parts is by pushing
&
.
Now that we know how Aria works, we will now get the Achievement.
You will want to equip the
Booster Body, then push up on the right stick
and do the following combo for
Crescendo: 
You will want to equip the
Blade Body, then push up on the right stick
and do the following combo for
Allegro: 
You will want to equip the
Bass Body, then push up on the right stick
and do the following combo for
Dissonance: Once you have successfully enter the combos, the achievement will pop :)
NOTE: Make sure you hit your opponent, if they block it, it does not count.