How can secondary chords be introduced in an accompaniment?

Music

What are the numbers of the secondary triads?

What are the three secondary chords in C major?

How can you make an accompaniment more interesting?

What are the three most useful chords called?

What are the numbers of the primary triads?

What are the primary triads in roman numerals?

What are the three primary chords in C major?

Two or more pitches played at the same time

The smallest distance between 2 pitches (1 step)

Which of these is a semitone? Use the keyboard to help you.