Maybe I did not make it clear: I open a new song, it opens with a realtracks style, I try to change the style to midi and it does not (always) work. This time I am not trying to change the style inside a track, I am changing the overall style of the song, it needs to change the tracks to accomodate the new overall style, but it doesn't. Wouldn't it be very strange if I had to create a new song to be able to pick another overall style.