useLoadTrackerSong reads a FamiTracker text export (File, Export text) as it lands, with its DPCM samples, and gives back a song that plays on the engine's NES like any other. Nothing has to be made first. What it cannot bring over is said once in the console.
It is the quick way to try a song in the game. For a finished one, a .song made from the export once loads faster, as the FamiTracker songs example shows.
Up and down to choose, space to play, left and right for the tempo, - and = for the key.