PSR Style CASM Editor allows you to edit the standard Yamaha SFF files (*.sty) or create your own style from the midi file.
The license of this software is Freeware, you can free download and free use this audio editing software.
NEW
* CNTT editor (double click on Cntt field) * Fast loading * Loading Progress * Font select in MIDI and in CASM editor * Defining of SFF2 file format (not possible to edit yet)