Hi, I have just added XMI support and I must tell it has been a tedious work. I cannot do more reliable conversion than the many existing tools. And it seemingly does not provide a big plus since no new music is made anymore in these formats. The existing ones (that can be found in games you can count on one hand) have already very good standard midi format conversions. So no direct HMI, MUS support will be added in the near future.