Yesterday I asked a person of Ketron about OS 5.0 and The answer was:
OS5.0 we called but is same as 4.2c but just only an application more for UK market..nothings more.
Regarding Electro Acoustic Guitar, when I have a good time I will create for Auyda.....
Style Producer, Sound Engineer, Sound Design.
Yamaha Genos, Ketron Audya 76, Audya 5, SD1, Korg Pa3x, microarranger, Roland Fantom G6, V-Synth XT, XV-5080, SH201, D-50, Novation KS4, Dave Smith Evolver