Chords for 緊急地震速報の音はなぜ怖く感じるのか？

_ _ _ _ First, listen to this.
_ _ [Ab] _ _ _ _ _
This is the sound of the emergency alert.
_ _ It makes you feel very anxious.
_ _ This time, _ _ _ I will explain and produce the sound of this emergency alert.
Please listen to this.
[C] _ _ _
_ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _
_ _ _ _ _ This is _ a major chord called C chord.
[Ebm] Let's make this tone the emergency alert.
_ _ _ First, make the tempo of this music _ 4.5 times.
[C] _ _ _
_ _ _ _ Next, make the C chord C minor and make it sad.
_ _ [Cm] _
_ _ _ _ _ _ _ [C] _
I will introduce a tritone that gives you a sense of tension.
Raise _ _ _ _ one key of the second phrase.
_ _ _ _ [Ab] _ _ _
_ It is completed.
In this way, the tempo is fast, the short phrase repeats,
and the key changes at a short interval.
By meeting the condition of a sad atmosphere,
_ _ _ _ you can create an effect that makes people anxious. _ _ _ _
This was the knowledge of the emergency alert. _ _ _ _
_ _ _ _ _ _ _ _