Piano Toast? (Orange Oasis)

[Mariepiedra]

There's a section where are a bunch of toast with sounds (top right in the map) , like a piano or something, anyone know the exacts keys i have to play on them?

[Pigeon]

If you're talking about the area at the end of the hallway with the man on fire then there should be a map in the upper left corner of the Orange Oasis telling you which ones to play.
Or just push the last few keys in order from left to right, you'll know you did it right when the last toast opens up a path.

[w1nwha]

To be exact you have to press the last four keys on the bottom so that it plays G A B C. You know, the sound that plays when you acquire an item.