Probably is a beta version.
A month ago i have reported to Ketron a problem introduced by the upgrade 4.0a (lyrics in midifile not synchronized with the song) and they send me a pre version 4.0b for test.
With this pre release i have solved my problem; so in my keyboard i have the 4.0b release and seems to be a stable software.
Unfortunately i don't know the other modification introduced in 4.0b.
However they asked to me that don't distribute this software, pheraps because it isn't fully tested.
[This message has been edited by acima (edited 05-30-2003).]