How to play sound when Niagara mesh contacts the ground?

[Player_003]

So i have shell ejection Niagara particle and i wish to play sound when casing hits the ground but how could i do something like that?

I activate Niagara Component on Montage Notify in weapon blueprint.

[brs-sebascova]

Hello there @Player_003!

This reminds me of a similar case from about a month ago:

How to trigger play sound for multiple collisions

Hello there @celestia! You are correct, that’s exactly how “Play Once" works, it will trigger only one time, then never again. And if you disable it, the particle will read as being in permanent contact, thus looping the sound forever. In order to play the sound per bounce, you will need to setup a logic using collision events, rather than using the “Play Audio” module only. It’s a bit more complex, but it should give you the result you are looking for. Should look something like this: For …

I think the same principle can be applied here, managing the sound with event handlers inside Niagara. The setup should be something like this:

• First, enable Particle Collision, so the casings hitting the ground are calculated (Particle Update > Collision module)

• Then, add an Audio Module, and assign your sound cue for the casing hit

• From there, setup a play condition, so the sound triggers only when collidiing with the ground (without it, it will sound forever)