1.   The performers use no pre-recorded tracks or tapes to augment their sound, which speaks to the skill of the BeatleMania musicians, Preston said.

2.   The sound is augmented by the vibrations generated by two lines of brightly costumed dancers as they repeatedly touch two sets of cables strung across the stage.

3.   Burlison, who does not sing, augments his sound with appearances from members of Los Lobos and The Band, among other guests.

4.   The discordant sounds are augmented by visual dissonance.