Great anime, just be warned that the english dub is TERRIBLE and for some reason EMBER put it as the default audio. So you'll need to manually switch to Japanese audio and english subs for every episodes (since it's a great anime and the Japanese voice acting is amazing!! ).

I recommend just getting a sub-only version though, like Erai-raws. English dub for this anime is not even worth it for the lols, it's 100% cringe.

I don't know what player you guys are using, but I tried looking in both MPC and VLC media player but could not find such an option.

I have two things to say here. I watch both sub and dub audio and there is nothing wrong with the dub audio. The guy saying the dub is trash is obviously a dub hater and trolling his dub hate.

Next to the guy having problems I just downloaded two of the comments and its obvious you don't know what you are doing. I was able to switch between sub and dub audio without any problems so its either you or your player is out of date. Maybe you are clicking on subtitle options and not audio.

Either way if you want an updated Media Player Classic that 100% does work Google Klite codec pack. Download it and you will have Media Player Classic thats updated weekly.
Once installed play any of these episodes making sure that you are using  Media Player Classic. Then right click with mouse and and select audio track and both sub and dub audio tracks will be there. I watched this series on Netflix and only downloaded two episodes to check audio tracks.