A settings switch that allows a tile to turn a different color after it has been played once (after a 20 second from START time). Default setting is always ON.
I preview the tile (song)... Takes all of 10 seconds (at the most). But after the tile is played, it turns to a different color to indicate the tile has been played (after 20 seconds, once the tile has been tripped). It could be a setting where you can choose a color choice (or series of color choices). The setting would ON by default for all tiles with the colors being the same. When you change the color, it changes for all tiles but only after being played.