Here is a video (from YouTube) of one of my favorite accordions, Emmanuel Pariselle, teaching a workshop on chords/rhythm/accompaniment on the diatonic accordion. As I watched this, I marveled at the subtle -- and drastic -- changes in effect that he can accomplish on the melodeon. Simply wonderful!
And while I'm at it, here is another video (from YouTube) featuring Emmanuel Pariselle playing his Dipper "Franglo" concertina/melodeon. I love it!!! Again, his great accompaniment style!!! Bravo! Bravissimo! More, please!