Just for info, here's where you route a track to the MIDI outside world:
Anyway, I do not know Independence. If you only have one instrument (not a piano) in it and click its built-in keyboard:
-- what do you hear?
-- does the level meter on the track show the audio level?
-- does the level meter on the Master track show the audio level?
Sample player? TX16Wx or Sforzando plus third-part SoundFonts / Sfz files (neither comes with its own sounds).
You could do worse than IK Multimedia's SampleTank 2 Free plus Sonic Reality's OmniSynth 2
https://www.esoundz.com/details.php?ProductID=4736
Note: SampleTank 3 is planned for release this year, but SampleTank 2 will continue to work. Some users have reported problems with SampleTank 2 so try out the Free version first.