No audio at all in Adobe Premiere Elements 15

[RaeaJade]

I'm new to video editing. I've been working on a few projects that include video clips and imported music tracks. All audio has worked just fine. Then today I open one of my projects and there is no sound. I checked all of my projects and none of them have sound anymore. I tried starting a new project and imported video and music tracks--no sound at all. I checked the settings to make sure that my computer speakers were the default and they are. The volume is not muted as far as I can tell. My computer plays audio just fine outside of Adobe. This just happened all of a sudden. When I closed the project last night everything played just fine, then I open it today and there is no sound. I never changed any audio settings. Any help would be appreciated.

Thanks!

[Davonia5FBC]

huge help! thanks 

[EidolonBex]

Hey, back in 2021 with the same problem- no audio at all- but none of the solutions seem to be working for me. I adjusted gain, went into Audio Hardware, etc. Elements literally JUST updated and I think that's what ruined everything. I am unsure what to do. 
When I went into the Audio Hardware and selected my speakers the first time it said it wasn't working, which was a lie because I was listening to music elsewhere. I picked something else, backed out, came back, selected my speakers and it said the speakers were fine but still didn't play audio. It's very odd.  

[EidolonBex]

Alright, new question, I'm noticing gain is defaulted to 0 no matter what aside from my speakers probably just actually being broken. Is there a way to change that?

[Bart25266367xik0]

This worked for me: Edit > Preferences > Media > Clean Up Cache