My Music (オレ曲セレクト, My Music Select) is an option in Super Smash Bros. Brawl, Super Smash Bros. for Wii U, and Super Smash Bros. Ultimate that allows the player to choose any music track for any stage and adjust the likeliness that track will appear in that stage when battled on. This concept is similar to holding L and R in Melee in certain stages, except that this mode can be done at any time, and there are more than two tracks for each stage (excluding Hanenbow in Brawl, which makes its own music with an ambient track as its backdrop; and Flat Zone X in Ultimate, which has only two tracks; additionally, Midgar also had only two tracks before more Final Fantasy music was added in version 10.0.0 of Ultimate). Several tracks can be unlocked for each stage, either through collecting CDs or meeting certain pre-set conditions.
Contrary to its appearance, setting a track's slider to its far left does not render the chances of that particular track playing to none; rather, it makes the chances of that particular track playing exceedingly small.
In Ultimate, My Music does not restrict songs to stages so long as they are from the same series. For example, all Zelda stages share the same track list which can then be adjusted to the player's preference. Ultimate also allows the ability to choose which song will play for a particular match.