Hi all,
In order for MIDI data to be output at the PSR-8000's MIDI OUT terminal, it is important that the HOST SELECT switch is in the "MIDI" position. (The MIDI connectors do not function when the HOST SELECT switch is in any other position.)
However, with many Yamaha arranger keyboard models, the DEMO songs are generally not output via MIDI OUT (probably for copyright reasons). Unfortunately, I don't know if the latter also applies to the PSR-8000.
Best regards,
Chris