WARNING: SOME FLASHING LIGHTS AND LOUD NOISES. go inside the project and go to the conduit sprite in the sound section. there, you can find some whispers that if you reverse, you can find what the souls were actually saying.
WARNING: (some) SPOILERS! ---------------------WALKTHROUGH---------------------- First - when you get to your aunts house, talk to her. Next - go to the third room with the bed in it. Then - wait for your characters dialogue to finish. Next - go down to the basement to find the cursed radio. unplug it and try every channel, but beware, because the sounds it makes will get extremely spooky. Switch the channel to... figure it out. Then, UR ON UR OWN!