MIDI instruments on Linux (Fluidsynth)

Hey, was just wondering what exactly I need to install to get the midi instruments working, I run the Linux version and each time I try to play an instrument I get a dialog that says I should install Fluidsynth, but I already have it installed. I tried installing the i386 version, still no dice. There isn’t anything listed on the official website about this, so I was wondering if anyone here knows what I need to grab to get musical.

Do you have a package named libfluidsynth-dev?

There’s currently a problem with the version of fluidsynth we depend on because the devs of fluidsynth did a really dumb breaking change. I haven’t gotten around to fixing it yet.