From Dota 2 Wiki
- Projectile launch sound plays as the attack projectile is released.
- Projectile impact sound plays as the attack projectile successfully hits the target.
- Play on each step while moving (20%-30% vol).
- Cast sound plays on Drow Ranger upon releasing the projectile. Replaces her projectile launch sounds.
- Play Cast sound plays on Drow Ranger upon cast.
- Precision Aura does not use any sounds.
- Marksmanship does not use any sounds.