The only controls available to shape the sounds in HSSE are shown in the interface. I think the vibrato is recorded in, so it can’t be eliminated. The good news, however, is that the forthcoming update (available later this week, all being well) will allow NotePerformer to play back microtonal music correctly. There are a number of further improvements for playback of microtonal playback coming in the new update, so there’s not long to wait. We have been working with people in the microtonal music community and they’re pretty happy with how things are looking and sounding in the new update.