6-Track Sequencer (5+1)

[Gagne77]

Hello,from France

How are the 16 MIDI channels grouped on the PSR EW425's 6-track sequencer (5+)1?

This question is because when playing MIDI files via a USB drive on the PSR EW425, I often have another track with (backing vocals or violins) on the drum track. A bit annoying!

 Any solutions? Thanks.