Why no support of vibrato?

Hello.

I've just been looking for a way to use the SoundFont file that came with MuseScore in my own projects in Renoise. I was very excited to discover this utility as it seemed to be exactly what I was looking for. However, I noticed in the readme that you do not support vibrato in the set of properties that are converted from sf2 to xrni files. I was wondering why that is? Vibrato seems crucial to the use of a lot of the sounds in many SoundFonts. Is it a technical limitation with the properties you can write in Renoise?

Thanks and thanks for the great project!

-- Greg