Hey, Ive had this problem with LMMS for about 3 years now but just use to ignore it however now its annoying. With some SF2 sounds when you export the file the sound is modified, it just does not sound the same. Sometimes more reverb is added or the volume is increased and it just ruins the mix :/ Ive tried different export settings but the same result occurs.
Like I said not all SF2 sounds change but one example is the 'ChoriumRevA' SF2, when using the pianos. However I do remember on the old versions of LMMS they had a 'high quality mode' which led to the same result of a different sounding SF2 sound. Any help appreciated Thanks