Rythm

1. Rythm is the part of music, which interracts most immediately, without it music won't be so hypnotic and pleasant. It gives us the feeling of excitment. 
2. Under rythm lies the concept of pulse of heart beating, so rythm is inherent in us. Rythm is presented in all kinds of music, even if we can't hear it.
3. "Tempo"
4. Swing is a form of American music that developed in the early 1930s and became a distinctive style by 1935. Swing uses a strong rhythm section of double bass and drums as the anchor for a lead section of brass instruments such as trumpets and trombones, woodwinds including saxophones and clarinets, and sometimes stringed instruments such as violin and guitar, medium to fast tempos, and a "lilting" swing time rhythm.