cant install on Ubuntu Studio 16.04

Hi,

I tried the PPA and it says that no package is available. So I downloaded the deb file for 12.04 and I got "dependency is not satisfiable libatkmm-1.6.1(>=2.22.1)

So I did sudo apt-get install libatkmm-1.6.1 and got the following....

vince@vince-desktop:~$ sudo apt-get install libatkmm-1.6.1
[sudo] password for vince:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'libatkmm-1.6-1v5' for regex 'libatkmm-1.6.1'
Note, selecting 'libatkmm-1.6-1' for regex 'libatkmm-1.6.1'
libatkmm-1.6-1v5 is already the newest version (2.24.2-1).
libatkmm-1.6-1v5 set to manually installed.
The following packages were automatically installed and are no longer required:
  linux-headers-4.4.0-43 linux-headers-4.4.0-43-lowlatency
  linux-image-4.4.0-43-lowlatency python-blinker python-cffi-backend
  python-ipaddress python-jwt
Use 'sudo apt autoremove' to remove them.
0 to upgrade, 0 to newly install, 0 to remove and 61 not to upgrade.

Can you advise please?