In music, there are different chords that are used to create different sounds and feelings. One such chord is called the secondary leading-tone chord.
To understand what a secondary leading-tone chord is, we first need to know about the leading-tone chord. The leading-tone chord is a special chord that is based on the seventh note of a scale. Let's take the C major scale as an example. In this scale, the seventh note is called B. So, the leading-tone chord in C major would be based on the note B. It is called the leading-tone chord because when you hear it, it makes you feel like you want to go back to the first note of the scale, which is C. The leading-tone chord is made up of three notes: B, D, and F.
Now, the secondary leading-tone chord is a little different. It is a leading-tone chord that is based on a different scale. Let's say we are in the key of G major. In this key, the seventh note is called F#. So, the leading-tone chord in G major would be based on the note F#. It is still called the leading-tone chord because it has that same feeling of wanting to go back to the first note of the scale, which is G. The secondary leading-tone chord in G major would be made up of the notes F#, A, and C.
So, to summarize, a secondary leading-tone chord is a special chord based on the seventh note of a different scale. It gives us the feeling of wanting to go back to the first note of that scale. It is made up of three notes and helps create different sounds and emotions in music.