Here’s a tutorial on how I trigger Niagara and Cascade effects in random locations using a “Random Point In Bounding Box” node with Unreal Engine and Ableton Live, via some MaxForLive devices.
https://dev.epicgames.com/community/learning/tutorials/Jp7M/how-to-trigger-niagara-effects-in-unreal-engine-with-a-random-point-in-bounding-box