I'd really, really like if there was a snare roll sound somewhere. It has been asked before and will be asked again on a regular basis.
The thing is that I have some orchestral scores (wind orchestra) and everything sounds just great. Though my purpose is to write scores for a real orchestra, the sound that MuseScore outputs is so good that it works very well as demos for various purposes. Now I feel that the only thing that doesn't work is the drum part. How hard would it be to create a snare roll sound? Most of the drum sounds are short beats. But how would a continuous snare roll sound differ from a continuous trumpet sound playing 440 Hz? Sure, the 440 Hz sound could have 100 samples looping at 44 kHz, while the continuous snare roll sound, if looped, would need a lot more samples to avoid a distinguishable pitch. I'd imagine one could loop a sequence of a snare roll that would correspond to the single drum stick beats, say 10 Hz.
It would ease up a lot, if these snare roll sounds would automatically attach to any snare note with the three-slant tremolo, but I'd welcome even other solutions that would require more manual work. Like having a parallel staff that played these snare roll sounds.