pearls: do you work for ketron for have the expansion ?
I hope will be possibile to apply the 256 to audya 76 without loose the in-out digital and without expensive hardware modification, but actualy is not so importat to have 256 ram because:
- we cannot create .ins file
- the current sounds from ketron are not so many good (only the sax but need much more memory)
- we cannot create drum kit with wav files ecc
maybe with Aj pack with more and good sounds I will see

dreamer: we cannot create .ins file because we need the software (proprietary of korg) and a audio card that use .ins format that is proprietary of korg. than you cannot use a simple pc program only.

and of course the msp limitation is very big

so I can understand the much more ram in korg, because you can full use the fantastic sampler, but in audya is only for use the sounds in hdisk from ketron.. and in next summer 2020 the new sounds from aj ahahha
is true... you can load .ins drum but where is it ?
nothing
I have 1 drum .ins file give me from ketron that reproduce some old sounds. but you cannot edit, you cannot use it sounds for mix with internal so big limitation