[FaeLenx]

Sound wave is not just a lackluster skill, it's actually worthless. It doesn't get extended by volume up, it is tiny in range and size, it doesn't do anything besides damage, and its scaling isn't even exceptional or worthwhile. The fact that it's one of two instances of sound attack being used in the song class is really just disappointing.

[Snake]

Make it an auto-hit, if it's not one already.

[FaeLenx]

Make it grow wider and longer with volume up.

Make it an auto hit.

Make it knock down.

Make it confuse.

Make it cause hesitate.

Make it start singing.

Make it make every other performer with the class skill invested use sound wave toward the nearest enemy.

Make it proc the song abilities of instrument weapons.