StageTraxx provides an exhaustive list of midi controllable parameters and functions, which may be controlled by external midi hardware and software controllers. Many songs and/or performances could benefit by being able to control some of these parameters from within StageTraxx during playback from everywhere in StageTraxx that allows you to specify midi commands to be sent. Including midi tags embedded in song lyrics, and assignable actions. This would provide extreme flexibility to make dynamic changes to your song during playback.
Imagine being able to configure a button that causes all tracks except the drums to be muted/unmuted, and pressing this to create a fun breakdown, and pressing again to bring everything back.
Imagine being able to mute/unmute specific tracks during playback to better facilitate a solo section that you want to play yourself by placing midi tags in the lyrics that invoke this control at the right times.