I downloaded some single VKeys patches from a German site (see Synth Zone under E-mu). One by one I put them into MIDI-OX and chopped the extra 16 bytes off (before the checksum)and changed the model ID byte. And guess what, they loaded into Classic Keys! The system doesn't care if the checksum is no longer valid, just that the byte count is right and IDs are right.
The question for anyone who has been able to view the Pro-Rec sounds in an editor: are they stored as singles? It's feasible to edit as a bank but not fun; you have to have hex and ASCII side by side to be sure where you are.
Another question: being that Classic Keys lacks the filter and portamento of the Vintage Keys,would many of these sounds be worth having?Especially synths.
Last, I'd humbly request that someone else in this boat contact Pro-Rec about the validity and merits of 'works with Classic Keys' as they really don't want to talk to me any more. Thanks.mn