i tried this twice
First time i dont no what hapend because i coulden rember my dream, usually i can remeber my dreams very well even without a jornal.

second time is worked but in the dream when i go the slightest hint that i was dreaming all the noises from the mp3 came all at once and woke me up
(i still think it works thogh that was probabley an off chance)

p.s excuse my spelling