The easiest way to get audio on Scratch is by downloading the correct files.

Step 1: Get a .webm Screen Recorder.
Step 2: Record anything on the screen that you want.
Step 3: Visit a website that converts a .webm file into a .wav or a .mp3. I usually use Cloud Convert.
Step 4: Upload your audio and boom your done.

Tip: Try to make your .webm under 100 MB otherwise it may not be able too upload unless you make an account ot something.

It's useful in many cases. Plus there are many types of video files so you don't have to just count on .webm.

Hi there!
The Suggestions sub-forum is for suggesting ideas to be added to Scratch. This seems more like a tutorial. Instead of posting it here, you could make a project about it!

Thanks, and Scratch on!