A gaming machine and a method of playing a game thereon

Described herein is a gaming machine and, a method of gaming thereon, having at least a first and a second display located adjacent each other, and at least one speaker, the gaming machine comprising: a symbol selector for selecting a plurality of symbols for positioning in 5 respective ones of a plurality of first and second symbol positions, wherein said first symbol positions are displayed in a gaming area of said first display; an outcome evaluator for monitoring said selection and determining when at least one trigger condition is satisfied; in response to said trigger condition being satisfied, triggering an event in which said controller is configured to select: 1) one of a plurality of music tracks to be played through said speaker, 10 each music track having at least one characteristic; and 2) a number of second symbol positions to be displayed on said second display; wherein the number of second symbol positions selected for display on said second display is determined at least in part by said at least one characteristic.