In Roblox Studio, find the Toolbox. If it's not open, go to the View tab and click the Toolbox button. In the Toolbox window, click the icon for Inventory. Make sure the left dropdown is to My Models.

As aforementioned, you will need the matching sound ID to add an audio effect using the Roblox Studio Explorer window. In the case of the popular Osu hit ( which is taken from the titular rhythm ...