This seems to be a general problem with LMMS since I started about a year or two ago. Even when the global volume in LMMS is set at max, the exported track is still fairly quiet. Admittedly, I set the instruments fairly quiet when I create the track. Need to make it a habit to turn them up more and ...
Uplifting, energetic track. Fully created in LMMS, with the PG-8X (free synthesizer plugin) for the bass sounds:
https://soundcloud.com/user-524629423/elysium