I'd rather show than tell! To see plenty of examples, visit the shortcode plugin page at http://jtab-guitar-tab-shortcode.marichiba.com.
Display guitar chords
[jtab phrase="C / Am / F / G G7"]
Display guitar tab with chords
[jtab phrase="Bm $3 4 4h5p3h4 5 $2 3 5 7 7h8p7 5/7 | A $4 7 9 $3 7 6 $5 9 $4 7h9 7 $5 9\7 5/7 |"]
Display a form allowing users to render jTab notation in real-time
[jtab showform='true' buttontext='jTab me, baby!' phrase='C Am F G']
Specify different class and/or id for the jtab div
[jtab phrase="C / Am / F / G G7" class="myclass" id="myid"]
Do you need different functionality from this shortcode, or a different plugin altogether? Hire me! Go to http://www.marichiba.com/contact-me.