You're absolutely right abacus.
There are usually two types midifiles, format 0 and format 1.
If I remember it correctly, KN2000 can load and playback both, but
only "direct play" one of the types.

Cheers
GJ
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Cheers 🥂
GJ
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"Success is not counted by how high you have climbed
but by how many you brought with you." (Wil Rose)