Where to download the original Mario theme song?

There is no one original "Mario theme song". The Mario video games have multiple songs including the Super Mario Bros. theme song, the Underground theme, the Castle theme, the Water theme, the Ending Theme, and more. Many websites provide options for downloading these game songs, but it is important to do your research to make sure you are using a reputable site and to follow the site's instructions for downloading the songs.

Here are a few sources where you can download the Mario theme songs:

* The official Nintendo website: Nintendo offers a variety of Mario-themed music, including the original Super Mario Bros. theme song, on its official website.

* Video game music websites: There are a number of websites dedicated to video game music, where you can find downloads for the original Mario theme songs.

* Peer-to-peer file sharing websites: You can also find the Mario theme songs on peer-to-peer file sharing websites like BitTorrent.

* Youtube audio converters: You can use Youtube to Youtube audio converter to download audio from Youtube videos. There are many Mario Theme song videos on Youtube.

It is important to note that downloading copyrighted music from peer-to-peer file sharing websites may be illegal in your country. Please check your local laws before downloading any music from the internet.