How to do the sage's jar of Zelda's soul track side mission

When you are divining, you should speak or blow into the microphone. After divination, she will sell you cans and ask you if you want to buy them. If the cans are hit, they will burst. Be careful.

Are you NDS or simulator? If it is NDS, check the microphone. If it is an emulator, check the microphone and settings.