20th century music
The 20th century saw dramatic innovations in musical forms and styles.
Composers and songwriters explored new forms and sounds that challenged the previously accepted rules of music of earlier periods. As well, composers and musicians used new electric, electronic, and digital instruments and musical devices. Better modes of transportation and communication allowed musicians and composers to travel more widely or hear shows, which increased the spread of musical styles.
Rhythm/Tempo concept introduced at National 4 is Syncopation.
Texture/Structure/Form concept introduced is Walking bass.
Timbre/Dynamics concept introduced is Reverb.