Andrew Gaydenko wrote:
  It is common file extension for SMAF file, if I
understand well.
 Fragment from 
http://smaf-yamaha.com/what/about.html:
 "...SMAF stands for "Synthetic music Mobile Application Format",
 and is a multimedia data format invented by the YAMAHA CORPORATION.
 The SMAF specification defines a format for multimedia files which
 can be played back on hand-held portable devices. The SMAF file has
 the virtue that files sizes are small relative to those of
 comparable formats, such as SMF (standard MIDI)..." 
Maybe you can try running the tools on the site under Wine.
Yamaha provides the specification on their site.  Maybe someone will
write a native Linux tool someday based on that.
-- Brett
Rule of Feline Frustration:
         When your cat has fallen asleep on your lap and looks utterly
         content and adorable, you will suddenly have to go to the
         bathroom.