Casm edit does not play back styles. It simply adds a casm section and the other required data to a midi file and allows the user to save the file as a yamaha style file. It worksweel but I like the functionality and simplicity of Michael P Bedesem's freeware stylemaker even better.
I have only tried the demo versions of Visual styler and Real time style performer, and that was some time ago so I can't recall all that much, except that they do allow you to play Yamaha styles in real time. Joe Maas' One man Band also does this, and it allows for the adjustment of many parameters to tailor the software to a user's needs. Also, Joe participates regularly at these forums and often updates his software based on the requests and needs of it's users. That's service that is hard to match.
AJ
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AJ