Docs - API - Using the API - SoundCloud Developers: "If you simply need an access token for testing, and do not want to go through the connect flow, or if you have one central account your app needs to access, you can use the OAuth User Credentials Flow. An example of this kind of app would be an artist's website where you'll only be using a single SoundCloud account for the artists sets, user information and sounds. In these cases you may exchange a set of user credentials for an access token."
'via Blog this'
