Home stretch @Nate1232!
From here you are going to want to create a custom event for your audio change that another blueprint. I created another trigger like we did before, except this time, I removed the trigger event from the original, and the new trigger placed elsewhere in the level can change the audio now instead. This is a beneficial method that will come in handy when you day and night cycles call their events. Remember, you will need to use the Get Actor of Class to cast to your sound blueprint successfully.
I hope the above is the solution you need!