It's the process of sound layering. Audacity is a simple program in which you can do this!
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Answer:
Open an application (Word, PowerPoint, etc.) and create a new file like you normally would. ...
Click File.
Click Save as.
Select Box as the location where you'd like to save your file. If you have a particular folder that you'd like to save it to, select it.
Name your file.
Click Save.
Explanation:
