Sound-centric game ideas

1. A Legend of Zelda-style game. However, there is no sound inherent to the gameplay--all is user-created. It would be played with a guitar controller, or something similar. This would be a re-purposing of this type of controller, and thus a completely new gameplay experience. One note would move your character forward. One for left turn, one for right, etc. Chords for attack. Different enemies are effected by different chords. It's an old type of game played in a new way.

2. Another Zelda-style game. This time, the gameplay is as we've come to expect from a Zelda game. However, when the Link-character plays the ocarina-thing, it changes the setting. For example, when he plays a futuristic kind of music, he travels to the same room, but in the world of Tron. When he plays Japanese music, the same room becomes feudal Japan. The changes in environment can provide items not present in other musics/rooms/times to allow the character to solve the puzzle.