Heather,
You stated "KN2600,KN2400 and PR54 recorded songs will not play on KN7000 without conversion.
I believe your are right about the PR54 (I no little about the PR Series), but the KN7000 will play ALL KN Series keyboard songs, including the KN2400 and KN2600. In fact, it works the other way also, the KN2400 and KN2600, will play KN7000 songs. After all, they are related.
Regards,
Larry Hawk
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Larry Hawk
Technics For All