String tremolo needs improvement

I absolutely love MuseScore - what a gift to musicians!

It gets better every iteration, though for the moment I'd say that the string tremolo, at least using Spitfire Chamber Strings, could do with some improvement. Whether it's the audio files or the MS sampler itself, I don't know, but sometimes the tremolo sounds like a sputtering car engine. It needs to be as smoooooth as possible.