Seventh chord construction operates within music theory by mandating that every interval between adjacent notes in a stack must be strictly defined as either a major third or a minor third, prohibiting wider spans such as perfect fourths. This theoretical framework establishes the classification of seven specific harmonic entities derived from triads through the addition of various seventh intervals (major, minor, diminished), while explicitly excluding combinations that violate the rule of thirds within vertical harmony stacks. The concept relates directly to tonal harmony and jazz theory by defining valid functional structures based on precise intervallic relationships rather than arbitrary note combinations.
Seventh chord construction operates within music theory by mandating that every interval between adjacent notes in a stack must be strictly defined as either a major third or a minor third, prohibiti…