Having used dominant seventh chords extensively,I am now trying to incorporate minor seventh chords into my compositions... Based on my [rudimentary] knowledge, minor seventh chords are usually used in ii-V-I progressions (replacing the ii with ii7) , and also to add "colour" to the chords... How else could i use these chords in my songwriting?
Besides, i have noticed that minor seventh chords tend to sound a bit "less gloomy" than minor triads, which i presume is due to the "major" component in them. (eg. Dm7 = D F A C which has an F major triad as its "element", ie. F A C). (Not sure whether my statement is true though). Could I use minor seventh chords this way, ie. to make my song a bit happier but not overly happy? Explanations would be greatly appreciated.