It appears to me, and I could be wrong, that the exemplar is someone playing over, or along with a MIDI or MP3 file.
Oh, and Joe Ayala gets my vote for the best overall player.
Gary

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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)