In the first area (Ruins 1), play through the map until you find the Master Keys. Now, step into the spot right above the keys and a hole will open on the ground. Normally, if you fall through the hole, you'll land in a little room in the basement floor. However, if you hold the jump button as you fall, you'll land in an alternative area of the basement where you'll find a free Warp Magic, and also a room where you can listen to the music and sound effects.