A maj7 sounds dreamy, a 7 sounds bluesy and wants to move, an m7 sounds soft and minor. The difference is the 7th on top: a half step below the root, or a whole step.
Play Cmaj7 then C7, and Am7 then Am, and listen for the top note.
Try this
Play Gmaj7, G7 and Em7 in a random order with your eyes closed, then name each by its sound.
My notes
Saved in this browser only.
How well do I know it?
How do I like it?
Keep it close
🤷
Note