Quickstep : Music
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The music is a fast alternation of boom and cha. In quick-step, there are slow 
and fast foot steps. All slow steps takes the full time of a boom plus a cha. 
Fast steps are done within the time of a single boom or a single cha.

Tempo : 50 to 52 bars/min

Reference :
Ballroom Dancing
Alex Moore
National Library Central 793.33 MOO

Modern Ballroom Dancing
Victor Silvester
National Library Central 793.33 SIL
Names of figures used in Jacie. eg. V6