I can't hear audio

I just want to be able to animate to audio. But when I drag the audio file into the timeline, I can't hear it. So what do I have to to hear audio in Animate? When I googled it, my first result is this: https://community.adobe.com/t5/animate/can-t-hear-audio-in-animate-cc/td-p/9212206 in which someone ansewered a solution, but I don't understand it(it might be important to note though, that this is from 2017). What is Action Scripts? Is it something that comes with Adobe, or do I have to install it seperately? Is it absolute necessary just to play back audio on the timeling in Animate?