There’s a quaint sidewalk cafe nearby. The street is quiet. The shop’s owner has an accordion on the shelf with a sign saying “please play me”. This is it! Your dream come true! But you don’t have your sheet music with you. You’re blanking on a specific song.What do you play?You pick up the instrument, adjust the straps, choose a voice, and start the oom-pa pattern.There it is!You mix in well with the cobblestones, birds, and wind. You switch from chord to chord, slowly introducing an unobtrusive melody. You can go on and on like this. There’s no stress, no strain.So! What are you playing?Major sevenths chords. Two of them. C Major 7 to an F Major 7.The major 7 transforms a chord to feel light and airy. Where C Major is solid, C Major 7 is ethereal. Where G Major feels strong and connected, G Major 7 feels like it wants to drift off. When you connect two Major 7 chords (especially in a distance of 4, like the C to the F, or G to the D), you get that French sidewalk sound… airy chords that are unobtrusive.You build a Major 7 chord by playing the 7th note of the major scale. So in a C Major 7, the notes would be C E G and B. You don’t have to play the C, so it’s just E G and B.For an F Major 7, the notes are F A C and E, or just A C and E. You can also think of it as an A minor (and the Major 7 of the C is the E minor).Give it a try!