Audio file narration is fighting with video audio on Storyline 360

Hello,

I have a .wav file (16 bit 44 KHz PCM) that narrates over a video .m4v that contains background music. When published, the video audio is much louder than the narration. This is not the case when I preview it on Storyline. It works as it should on preview. Individually the volumes are exactly as they should be. I tried editing the video to bring down the volume and that didn't work.  I tried increasing the volume (through Audacity) to the narration and that didn't work. Each time it sounds the exact same way.

How do I get the audio file to be louder than the video?

Thank you.

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