From my experience mp3 versions don't work (you can forget the youtube too) so you have to use actual program.
Free idoser download
(includes I-Doser application and 204 diferrent dose files)
Don't worry, it's 100% safe (no viruses)
Here are the instructions to make it work:
1. It only works if you use stereo earphones (speakers won't work)
2. Listen to it while you're laying down comfortably.
3. Darken your room or put a towel over your face
4. Concentrate on the sound
I recommend to try these:
Hand Of God
Their 200 dollar dose that will definitely make you feel something.
I felt paralyzed and started breathing heavily. Then I've experienced motion sickness. I felt like my bed is rising on some angle and I'm about to slide down from it right on my head. Then it got really weird. I've seen myself from above and my body was twitching until it was all twisted but it wasn't really solid but more like it was made of an energy. I don't know if I was imagining this or dreamed about it or what...Then I felt like my arms and legs are being ripped of, just without pain...
Gate Of Hades
This 200 dollar dose is designed to make you really scared. Sometimes it works, sometimes not but overall it's kinda disappointing. My body felt heavy, body temperature jumped from 36.5°C to 40°C in only 2 minutes. The 2 minutes I was shacking like crazy but that only happened the first time I tried this dose and never again. At one point you'll hear loud metallic sound like when Neo jacks into the matrix. Try to speak after it happens and you'll hear yourself sounding like a robot. Then near the end very loud and uncomfortable sound kicks in. You'll think you won't be able to take that anymore but you'll get use to it after only 20 seconds. Only thing that was scary about this dose were some creepy cracking sounds that came out of the right earphone near the end. I can't really describe it. Sounded like something between a clock ticking and monsters whispering. I didn't experience any hallucinations during this dose. My friend screamed and removed headphones in the middle of it. He said his vision turned red and he felt like the room is spinning and like he's going to crash in something. Yeah, and during most of the doses you'll fall into REM state where you'll be half dreaming, half awake. I guess this is what causes the hallucinations.
Orgasm, MultipleO, Wet Dream (unofficial)
These 3 are pretty cool. Just don't try "Sex" (unofficial). It will give you a headache and instead of feeling like you're having sex, you'll feel like you're at a dentist and he's pulling out your teeth. Seriously
There's also alternative to idoser. Free program called SBaGen