This is the free version. It includes 100 ear training lessons. SECTION “A” has twenty rhythmic lessons and twenty melodic lessons. SECTION “B” has twenty rhythmic lessons and twenty melodic lessons. SECTION “C” has ten rhythmic lessons and ten melodic lessons. On section “A”: - Each lesson is integrated by fifteen exercises. - You will hear a musical idea and you will see two scores. One is right, the other is wrong. - You have to click on the right score. - You can repeat the exercise