Crescendo of Violence
Your skill with modulating the sounds of your sonic weapons into musical patterns borders on showboating but also inspires your allies.
Preqrequisite
Charisma 15 or Profession (musician) 5 ranks.
Benefit
When you score a critical hit with a weapon that deals sonic damage, in addition to any other critical hit effect you would apply, all allies within 30 feet of you gain a +2 morale bonus to your choice of attack rolls, skill checks, or saving throws until the beginning of your next turn.
Source
Interstellar Species pg. 98
Dragonscript
ID
433bf944c8d0493ba2e170be