So I got seq24 to play sounds when I click on the piano roll but when I try to play the pattern nothing happens. It's running through qjackctl but clicking play in seq24 isnt doing anything. I'm using 12.10.
You probably need a patched version of seq24 as the version in 12.10 (0.9.2) has a JACK transport issue. Keep an eye on the KXStudio-Team PPA, it will soon have a patched seq24 package for Quantal too.