Audio leveling

I'm running into a problem with different audio volumes, depending on the day the audio was recorded, surroundings, whether the person had a cold that day, etc., etc., etc.Is there some way to level the volume of audios across a title to make sure the learner doesn't have to turn up the volume on one slide, only to get blasted out on the next slide and then back again?Also, associated to this....maybe there's a volume control that can be added at the title level to show on all pages to allow for adjustment. Please keep in mind, this IS NOT video, but attached audio.Thank you!

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