I am curious Hourence, how are you attempting to play the DialogueWaves?
You mention you want to create a SoundCue out of them, but that actually reduces some of the flexibility of the system, and I rather dislike how everyone seems to need to create a SoundCue and a SoundWave for every piece of audio.
There probably isn’t a better way to do what you are trying at the moment, but I want to make sure we understand your use-case to ensure it’s addressed in the future.