I've checked the forum and I've found posts that mention the following two repositories:
deb http://repository-origin.spotify.com stable non-free
deb http://repository.spotify.com stable non-free
At the moment, I've installed Spotify 0.9.4.183.g644e24e0 following the instructions specified in:
This post is confusing, it says that the latest Spotify client version is 0.9.17
I presume that the website download folder structure could reflect the client version to avoid future misunderstandings.
Regardless of the repository used to install Spotify the following error is reported in both cases (in spite of that, the client was successfully installed):
W: GPG error: http://deb.opera.com stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 63F7D4AFF6D61D45
My Spotify client does not include the option/button to read lyrics through MusiXMatch though. Which Linux version includes this button ?
May be someone could also post a list with the existing repositories, corresponding keys and Spotify versions. It would be nice if a short description is attached to every repository.
PS: The following two URLs and its content (different clients/architectures) are accesible through a browser: