It's my voice that i say "happy halloween". The tone is a little bit funny. I use this in my halloween game. Recorded by microsoft recorderedited in http://mp3cut. Net/tw/.
I made a good comparison to jacksepticeye's videos and what happens in his house. Took about an hour to make because i was repeatedly adding 250% more gain to the intro(on audio mass) but i added so much that when i downloaded it it came out sounding like just static so i added way less gain. I recommend going to audiomass. Com to try this out if you like.
The sound made by my voicei adjust that pitch, and also add a reverb. You can just use it or deformation it freely. But if there's a work made using this sound,i'd appreciate it if you could let me know. (like youtube link).
