How do I use a custom-custom song?

Question

Analogy:

In The Impossible Game, its level editor allows you to choose your own song by simply pressing Ctrl + A or clicking the "Open Audio" button.

In osu!, you can simply drag any .mp4 file into the editor and you can start editing a beatmap (or set of beatmaps) for it.

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Question:

Is it possible to do that in geometry-dash? (Store link)

The closest thing I've found to that is this:

Which basically restricts me to anything on newgrounds.com.

Can I use a custom-custom song (one not from Newgrounds)? If so, how?
Basically, any work-arounds?
Obviously on a map that I definitely plan on not uploading, but for my personal use.

Answer 1

1: Download any song in-game. Remember the song ID. It should be displayed in the "Saved" folder.

2: Get your .mp3 file.

3: If you are playing on a Windows computer, go to "C:\Users[username]\AppData\Local\GeometryDash" and replace the music file with the song ID you remember with your .mp3 file.

4: If you are playing on a Mac computer, go to "~/Library/Caches/" and replace the music file with the song ID you remember with your .mp3 file.

5. Use that song in-game that you changed.

6. Have fun!

(Note: This is not universal and it will only affect your song. No one else will hear the same .mp3 file as you do. Other than what I've described, there is no other way to get a custom-custom song)

Answer 2

On SteamCommunity I've found this question:

Any chances of non-newgrounds music for editor in future?
Being able to use our own music in the editor would be great. And if for some reason you wouldn't like custom music in the in-game public user levels, then just don't allow songs with custom music to be submitted publicly. We can share them outside the game if we have to.

And that's not the only one asking this. So I think it's pretty obvious you can't (for now).

Answer 3

Since Newsgrouds isnt going to be your opions, There are other options you can do.

1: Download a custom music from a level, such as Cataclysm uses At Speed Of Light. You can download it using the download button, As this will give you a warning when you play the game, that you have no song downloaded.

2: Go to your level, open your custom music folder, (which is where it is on your picture) Open Saved and that will lists all the music that you downloaded from the level. And your completely done!

Otherwise not, If your talking about music not USING Newsgrounds music, such as iTunes. I'm sorry, but that wont be compatible with Geometry Dash yet, since they are just using Newsgrounds. RobTop Developers may add it in the mean while. Maybe wait for Geometry Dash 2.0, a great update :D

Hopefully this has fixed your problems! :D Have a great day building your levels!