Dominant ninth chords were utilized by Beethoven, and eleventh chords appeared in Impressionist tunes. Thirteenth chords appeared within the twentieth century. Usahakan belajar 1 lagu sampai bisa agar fokus saat berlatih tidak terpecah. Tidak perlu terburu-buru untuk menguasai lagu tertentu. Harmonies dependant on fourths and fifths also appear in folks https://www.inschord.com/search/label/