Looking at the files in a Hex Editor, it would appear that they were recorded on a KN1500. As far as I am aware, the only way to play them on a KN7000 is to change the Hex identifiers in the files.
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Willum

After silence, that which comes nearest to expressing the inexpressible is Music.
Aldous Huxley
( especially when the music is played on a KN7000....)