If you are interested in more experimental code, add also this file at the same place:
Note that you need to explicitly install new versions from the experimental repository, as they will not be installed automatically.
You will also need to install a GPG key to verify the repository. Download this file:
Then run the following command:
$ sudo apt-key add key.asc
The fingerprint of the key is as follow:
CDB3 BC52 DFDC 8A58 35F1 714D 0309 943D 9AD0 8F3F
The following command installs the jarc package after updating the package index:
$ sudo apt-get update
$ sudo apt-get install jarc


