how does custom audio music work, with a trigger speaker?

how does custom audio music work, with a trigger speaker? I have my personalized music in my documents, I put a Creator table of scenic sequences, I put in a group of loudspeakers (basic reds) with my personalized music and the percentage 30%. yes because there is that where can apparently lower the volume, the other speakers of the park (those base black), or the scenic speakers (those basic gray) can not lower the volume. I do this in a dark-ride where there are several areas and rooms, I do not have everywhere the same sounds personalized. moreover, I try to put precise moments for certain, or try continuously such opening hours at such time closing, but nothing works. It's difficult to understand if someone could enlighten me?
 
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