Majora's Mask has the whole 3 day loop time system throughout the game, at the end of the three day loop, unless you go up the Clock Tower, summon the giants, stop Majora's Mask and Save Termina, you have to either play the Song of Time to escape back to the start of the first day, or get a game over forcing you back there.
Now, when you get the Song of Time, you actually also get 2 other songs to complement it. Though the game doesn't directly tell you that you got them, they don't even show up in the Song UI.
This Scarecrow gives you a hint towards the presence of the secret songs.
Play the Song of Time Backwards and you get the Inverted Song of Time, which slows the in-game clock down to 30% of it's regular speed (50% in the 3DS Version)
Play each note twice in the Song of Time and you get the Song of Double Time, which skips the in game clock forward 12 hours.
Now, both of these songs are entirely optional. You can beat the game without ever playing them once, or even knowing that they are in the game even. They are more there for people that want the games Time System to be a lot less restrictive to deal with if they don't like it. They also help make some of the events easier to deal with like the Alien Invasion at Romani's Ranch. Whilst there are places that let you skip forward time without the need for the song (Like the grandma who reads you the long stories in Clock Town) having to teleport to them to skip time can be inconvenient if you need to wait for a certain day for a future event.
So, here's the questions of the thread.
1. Did you know about the Song of Double Time and Inverted Song of Time when you first played Majora's Mask?
2. Did you use the two songs when playing through Majora's Mask?
3. If you didn't know the songs when playing through Majora's Mask, would you have used them if you did?
4. If you were to replay Majora's Mask today. Do you think you could play through the whole game without ever using either of these two songs?
I guess your response will come down to how much you like the Time System in Majora's as well your general game skill. But I'm curious to see how people respond.