A sixteenth note rhythm is one in which each of the beats in the bar has been subdivided into four parts of equal length. This means that there are sixteen places in the bar where you can start or end notes or strumming patterns. Each beat may be subdivided into four evenly spaced notes, which are called 16th notes because there are 16 of them per bar. Sixteenth notes are twice as fast as eighth notes. ^{guitarplayer.com}+2 ^{2 1 3}