Can't install Musescore 2 on Debian
I have tried installing Musescore 2 using the following:
# aptitude update && aptitude -t jessie-backports install musescore
but it throws the following error: "E: The value 'jessie-backports' is invalid for APT::Default-Release as such a release is not available in the sources"
When I install via the Software GUI I can only install 1.3
How do I get version 2 installed on debian?