For years I worked with Score Perfect Professional SPP4.0 t / m 7.0 in which music works were all saved with the extension * .SON also you had the choice to save a job as a midi file or MusicXML * .XML latter is by MuseScore unfortunately does not recognize as well as all files * .SON. I would also note that when I, when opening a musical work garnered as a midi file, in MuseScore are so many flaws that it is better immediately re-enter the work in question. My question; there is an option that I can read files with the extension * .SON? That would be considering the many musical works that I have can maintain created with that program. Thanks for any suggestion.