Why is the audio so quite?

my TeamSpeak works fine everything good, but my audio plays so LOW i have my audio turned up to 100% but cant hear them at all really.. but all my other audio thing work fine. like music loud n clear i watch videos it fine discord even works fine. i just dont get why TeamSpeak is so low

There is usually more than one way to increase the volume:
Have you already increased the output volume of the TS client?
Isn’t that Windows has the volume of TS app turned down? You can check by opening the volume mixer!