Nope, in fact I came to that realization late yesterday as there is no specific procedure in the manual, although the naming convention of "Song Seq", had me thinking it was the same as a midi file. Also, I guess I thought a midi file could be loaded into memory based on what the PX3 can do. Same for the "drag & drop" from a PC. At this point, the editor seems to be the expansion that the board needs to be complete, for me at least.