Many thanks for Your kindness.... I am going to try and then I will
tell You. I forgot to write I have the 1.1 OS version, while the chip
on the right side has a sticker named C3, if I am not wrong...And
more, some of the presets can be played only in the left of the
keyboard, some until the central part , some more or less. I could
test it only by using a stereo headphone, with the sound sent all on
the left. But most of the presets can be listened entirely on the
whole extension of the keyboard, even with this lousy system...
See Ya!