I Need Help With a Music Volume Setting

So, my game, Gunventure, has been too loud at times, so I decided to make a music Volume slider and a SFX Volume slider. The only sound effects (right now) are audio.beep. I don't know how to change the volume for that. However, when I tried to make a music Volume slider, it didn't work for some reason. The link to the game is here: https://microstudio.io/i/codecat1/gunventure/ . You can access the settings by pressing the "?" button in the main menu. Essentially, the way it works is by having a storage variable so your settings are saved, and changing the volume by that number. The number can be changed from 0 through 100, and the volume is changed by the default volume divided by 100. However, in the engine, it says [object object] as an error in the console. Can someone help? Also, how would I change the volume for the audio beeps?

Thanks!

  codecat1