Dominant Seventh Chord: The dominant seventh chord is built on the fifth scale degree in a major or minor key. It adds tension and a strong desire to resolve back to the tonic. It's like when you're playing a game and reach the final boss, creating excitement and anticipation.
Subdominant Chord: The subdominant chord is built on the fourth scale degree in a major or minor key. It provides stability and acts as a contrast to the dominant chord. It's like having a reliable sidekick who supports the hero throughout their journey.
Leading Tone: The leading tone is the seventh scale degree in a major or minor key, just one step below the tonic. Its close proximity creates tension and an urge to resolve upwards. It's like climbing up stairs but stopping right before reaching the top, making you want to take that last step.