The minor third is commonly used to express sadness in music, and research shows that this mirrors its use in speech, as a tone similar to a minor third is produced during sad speech.
In music theory a minor third is a musical interval that encompasses three half steps, or semitones. Staff notation represents the minor third as encompassing three staff positions. The minor third is one of two commonly occurring thirds. It is called minor because it is the smaller of the two: the major third spans an additional semitone. For example, the interval from A to C is a minor third, as the note C lies three semitones above A. Coincidentally, there are three staff positions from A to C.
Cancer Ascendant – 1/10, 2/11, 3/12, 1/4, 2/5, 3/6, 4/7, 5/8, 6/9, 7/10, 8/11, 9/12.
Capricorn Ascendant – 1/4, 2/5, 3/6, 4/7, 5/8, 6/9, 7/10, 8/11, 9/12, 1/10, 2/11, 3/12.
The Minor Third encompasses 3 semitones or 90 degrees forming a Square in the Geometric representation on the Octave. It symbolizes Cancer and Capricorn as the 1st house for Cancer natives is the 10th house and the 4th house is the 1st house for Capricorn natives forming a square and moving 3 houses or 90 degrees on the Zodiac wheel.
The sound symbolizes Cancer and Capricorn Sadness, struggle, and depth of feeling. If you’re a Cancer or a Capricorn native (Sidereal) you could listen to the clips below and see how they make you feel.
Below is a link to a video for Minor thirds.