Brain Flex v2

Limber up your Neurons


Brain Flex is an experimental (and free) composition of brain wave frequencies designed to perform the following:

  • If you are in a stuck, negative or unproductive state it can lead you someplace else.
  • If you are already feeling good, it can make you feel even better.
  • If you’d just like to exercise your mind, running it through a series of state changes by altering its external stimulation in unpredictable ways, it can do this too.

Our brain waves fall into predictable patterns. Unless we are experiencing new people, places and events regularly, there’s little demand to increase its flexibility or range. If we’re not meditating regularly, or effectively, we may not hit the more interesting realms of lower alpha and theta except on the quick slide into sleep. And may not notice when we do.

This thirty minute adventure takes the brain through the gamut of all the typical states of beta, alpha, theta and a splash of delta. But it also peaks into some experimental frequencies like gamma (above beta) where research is discovering that unusual mental experiences like mystical and shamanic states may live. Or at least correlate. EEG studies found the affects of the South American, hallucinogenic alkaloid mixture “ayahuasca” produced the particular gamma frequency we chose.

woah… this thing is awesome… i listened to this for an hour before going to bed and i dreamed a whole week in one night…

We haven’t had any reports of people hallucinating with this composition, but we would like to make a few suggestions on its use.

  1. For best results, listen with headphones.
  2. Please do not listen to this while driving, flying a spaceship or any other activity that may need your full attention for safety.
  3. It’s probably not a good idea to listen to this before going to bed, as it tends you leave you energized.

OK, so prepare for a journey, we hope you enjoy it. Please feel free to send us feedback through our contact form or comments section.



  1. Juraj July 22, 2007 at 10:10 am

    I experimented somewhat with altering brainwave frequency, only to find out my brain often stubbornly refuses to tune out of beta (i even have insomnia sometimes). It goes to great lengths like producing headache or small muscular cramps to prevent from altering the frequency. But BrainFlex did not cause either, made me feeling refreshed, so it looks promising, thanks!

  2. Niles July 25, 2007 at 10:43 am

    Great stuff – although I can’t help to think about the dangers as well – I imagine you could achieve the opposite effect with this technique as well (like psychosis or anger).

    This really helps me out, though – I can actually pull off 80-hour workweeks now without losing focus. – thanks!

  3. Grasshopper July 25, 2007 at 12:49 pm

    Thanks Niles; yes, meditation can affect some that way too, which essentially what these entrainment methodologies do —allow access to deeper parts of the mind— which is a vast and largely unexplored space. Although an 80 hour work week sounds a bit scarier to us than exploring the unknown 🙂

  4. Van Tango August 16, 2007 at 9:47 pm

    I yo-yo for a living, so I thought it was pretty cool how this helped w/ my hand-eye coordination. I felt very rejuvinated after listening to this. I use it very frequently. Thank you.

  5. Damien ander September 7, 2007 at 11:24 pm

    Is it safe to use this everyday? to help lets say… studies or other work?

  6. Grasshopper September 8, 2007 at 12:27 am

    Damien, entrainment has powerful effects on the brain, as you’ve probably noticed. But there are only two warnings. Many frequencies, especially those available on this site, will alter your consciousness, sometimes dramatically, so please don’t listen to them while doing anything that requires your full attention for safety, like driving, riding bikes in traffic, operating machinery, etc. We put this warning in the article.

    The second caveat, a little more esoteric, is that if you use photic entrainment (e.g.pulsing lights) with xenon based strobes and you have a history of epilepsy, certain waveforms have been found in some cases to induce seizures. We don’t have photic entrainment embedded in Brain Flex and no seizures have reported as induced purely through auditory stimuli. We do, however, have photic entrainment on the Biorecharge, but we are not using wave forms on that CD which are implicated in these rare cases and most people are using led goggles rather than xenon strobe lights when they use entrainment products. Other than that, you should be good to go.

  7. Sal September 15, 2007 at 11:04 pm

    I was just wondering if I was able to do different things while listening to it, or if it would be better to listen to it with say…my eyes closed. When I say doing different things, I mean surfing the web, talking to friends online, etc.

  8. Eric September 16, 2007 at 6:42 pm

    The second i started listening with my headphones my neck felt relaxed, almost limp. About 3 minutes in my skin felt softer, like a pillow. It almost made me go to sleep even when I had it as loud as possible. Very comfortable.

  9. Grasshopper September 16, 2007 at 8:51 pm

    Hi Sal,

    Feel free to experiment and find which activities it complements (as long as it’s not driving and such.) The neat thing about changing your state is that new states can bring all sorts of different resources and styles of attention to bear; this may mesh better with some activities than others and the flexibility and skill you bring to the table for utilizing these states is a big factor as well.

  10. steve lawson November 2, 2007 at 8:25 am

    hi thanks for this free 30minute sample. I have various other brain wave cds . I frequently use theta and then gamma and hyper gamma wave on a daily basis. This is great as it goes through all frequencies to give your brain a real workout.
    The concentation levels i achieve are outstanding, i feel tingling in my head and an energy sensation on the top of my head and in between my eyebrows.
    This is also great for intense chi kung sessions.

  11. Gary Koji April 14, 2008 at 7:43 am

    Heya, I do alot of brainwave meditating and I compliment you on this awesome version. I will definately spend alot more time with this.


  12. raymond May 13, 2008 at 11:27 pm

    this website help me alot from just readin and listenin to the music but yah like i can get use to it

  13. frank May 30, 2008 at 11:50 am

    hey ive been doin brainflex for about 3 months now ….its amazing i like playing with brainwaves it makes me feel relaxed and refreshed

  14. mike July 31, 2008 at 7:34 am

    Ive just listened to the music file and tbh i feel more alert than i have since i had my stroke nearly 10 years ago im not sure i understand how or why i just feel ‘fully awake’ for the first time in many years as well as a noticeable feeling of being calm and relaxed.

  15. Shen August 11, 2008 at 1:59 pm

    this is fantastic, i will definitely explore more brainwave meditation. this is very calming to listen to, but doesn’t lull me to sleep.

  16. John August 19, 2008 at 5:00 pm

    Since this monday i’ve been listening the music file twice a day while going to school and going at home via bus which the trips last longer than the music. I must say somehow I feel more “awake” like the said. I’m more open-minded and getting better new ideas since then. I must say this is awesome :O

  17. Carley October 26, 2008 at 4:44 pm

    I’ve been listening to BrainFlex almost every morning for about 2 months now. I find that my day is much more energetic and flows much better as a result on the days that I listen to it. On days that I miss my energy level isn’t as high and as a result neither is my mood. I lay on my bed and listen, but I have a very difficult time concentrating on it. My mind never shuts off and is constantly thinking about things. Even with this I’m still finding benefits. Thanks. It’s awesome.

  18. Aaron December 29, 2008 at 1:07 pm

    hey i was listning to this and i drifted off and had a violent dream (probally the worst ever)

  19. 'FX' December 31, 2008 at 4:49 am

    Hello Grasshopper team !
    I’m hypnotizing people on a rather regular basis, and thought you might be interested to know that I’ve obtained interesting results with brain flex. There is surely much left to discover in the brain…
    Thanks for this composition.

  20. Grasshopper January 3, 2009 at 3:46 am

    Aaron, that’s not fun. It sometimes happens with theta though, it can bring up stuff. Serious meditators can run into this too. Shinzen Young has a good exploration of the territory.

  21. Michael July 25, 2009 at 4:34 am

    Sorry if this sounds a bit sceptical, but its just a load of ambient music, no different to some of the stuff I have on CD. This is Pseudoscientific nonsense and it certainly hasnt affected my thoughts or behaviour in any way. I feel exactly the same, even after the whole track was finished. I think what everyone seems to be feeling is in fact a form of the placebo effect, by which if you believe you are being affected by Brain Flex then you will start to experience things which you will attribute to it, even though it had nothing to do with it. In short, it’s a nice idea, but there’s no evidence to say it works at all.

  22. Grasshopper July 25, 2009 at 3:21 pm

    Michael, thanks for your comments. What you are experiencing is actually the nocebo effect. If you believe something will not affect you, or will affect you negatively, you may just validate your own expectations. The effects of entrainment, however, have been empirically documented. In fact, with an EEG, you can easily see, and measure, the impact of this external auditory stimuli on brainwaves. But the experience of these effects can be overridden, like most experiences, by our beliefs. Thanks for trying the experiment, please keep and open mind though, the fringes of today are the scientific revolutions of tomorrow.

  23. Greg August 20, 2009 at 10:33 am

    MP3 is a lossy compression algorithm which drops entire audio components deemed to be psychoacoustically “inaudible”, i.e., a softer sound that’s masked behind a louder sound. That makes me wonder how much of the effective subliminal content is absent in the MP3. Could you provide the option of a lossless-compressed download? FLAC is one such format–it weighs in at approx 40-60% of the size of the original–not so great compared to MP3’s 5-10%, but not a single wiggle of the waveform is altered by encoding/decoding.

  24. Grasshopper August 20, 2009 at 12:24 pm

    Greg, thanks for stopping by. This comes up from time to time, so this may be a good place to address it.

    First, we don’t have any subliminals in the BrainFlex track. People do report hearing voices and dialog, this happens naturally sometimes when we pass through hypnogogic states. It can be interesting in its own right, but none of those voices are coming from BrainFlex 🙂 (Have you ever heard someone *shout* your name just as you are falling asleep, or is that just us?)

    Second, mp3 can screw-up binaural beats if not encoded correctly. Or if the mp3 is re-compressed by software used to sync to media devices. For the later, check and make sure the filesize is the same on your mp3 player as it was when you downloaded it. For the former, we’ve encoded BrainFlex using mp3 options which preserve the separation of frequencies and the fidelity of the entrainment modulations. That’s one reason it’s larger than your typical mp3 for this length. It’s easy to get it wrong, and there are lots of people dabbling with entrainment on the net that haven’t taken the limitations of mp3 into account. But, no worries, we’ve got your back.

    (BTW, there are some entrainment and frequency technologies that absolutely require loss-less encoding; for those we’ve gone with CD only distribution. We may be using FLAC in the future; it’s a great protocol, and the media players are catching up.)

  25. Elskede November 17, 2009 at 2:42 am

    There is most certainly dialogue in here. It is the lowest most electronical sound. It is indistinguishable language, but it is language. Grasshopper, you should tell us what it says. Or I can just use your sample, disect the different tracks and come back and tell you guys what it says….

  26. Grasshopper November 18, 2009 at 1:39 am

    Elskede, what you are hearing, especially if it seems to be coming from the left side, and your headphones are on correctly, is probably the didgeridoo. It’s certainly dialog, but not speech or semantics. There are no words or messages on this track 🙂

  27. aji November 30, 2009 at 10:54 pm

    whoa! i had been listening to this two hours ago. when it ended i felt so relaxed that i fell asleep. then i was lucid dreaming, and my dream was running for like half a day while i was sleeping only for 1 1/2 hours. whoa! amazing. the best part is, i could remember every single detail of the dream. amazing.

  28. Panos December 4, 2009 at 6:45 am

    Hello, i heard about this new brain flex sound and i tried to hear it before doing my homework. Well, it didnt work as i thought it would. Have you got something to suggest for better use or something that will help me?

    Thank You.

  29. Mixxd December 4, 2009 at 4:34 pm

    It’s been working wonders for me, but I recommended it to a friend and he reported “about twelve minutes in it seemed to continue to grow in volume until it hurt my ears and it left me with a headache”. He didn’t touch the volume control however, so there still might be a few kinks for some people. I still recommend trying it though, because for me it works great!

  30. just Dan, thank you July 25, 2010 at 10:21 pm

    I’ve used this on and off since 2006, and I have to say, whenever I’m going off the rails, this audio helps get me back on track. I had a rough day today, full of chaos and a lot more noise than I would have liked, I had a headache, even, and this not only killed the headache but put me back in a state of calm. Thank you for this little lifesaver.

  31. Vato May 23, 2011 at 7:38 pm

    Why do i feel completely numbing vibrations each time in different parts of my body when i get focused on this sound? Oh and fruit becomes a like a drug right after listening?

  32. Vee July 15, 2011 at 12:38 pm

    I found this years ago, and I never felt an effect on me, but some friends I had listen to it were really impressed by whatever they got out of it. I didn’t try it again for a few years but thought I’d try it again today, and I’m pretty sure I actually felt worse after listening to it… what happened?

  33. Grasshopper July 15, 2011 at 3:16 pm

    Good question, but there are too many variables too satisfactorily answer. To best experience the effects you’ll want to listen with good headphones, with your eyes closed and at a volume that is comfortable for you. Drink some water beforehand. You generally don’t want to be doing other things, like surfing the internet, reading, etc. where the competition for neural activation might make it a struggle. In general, the more you can let go of yourself into the sounds the richer the experience. Thank you for trying it.

  34. jezriel November 14, 2011 at 5:01 pm

    thanks… is it possible to access certain parts of your brain normally inacsessable
    with this?

  35. CHANDRAVADAN BACHHAV November 19, 2011 at 3:17 pm





  36. Sabina November 21, 2011 at 5:08 am

    Thank you so much for this, Grasshopper. I listen to this every day and feel afterwards calm, refreshed and very, very alert.
    I just have a quick question for you – is it safe to listen to this while on medication or drugs?
    Keep up the good work.

  37. Grasshopper April 16, 2012 at 12:30 am

    Sorry I missed this comment. The site has been going through a transition. I don’t know how to answer that, Sabina. On the one hand, you could experience vertigo or anxiety depending on whether the medicine or substance was compatible with your inner state, on the other, it could enhance it in various ways. Many variables.

  38. jezriel April 26, 2012 at 3:49 pm

    Once again…. love the Brain Flex V.2. Also, I like what you have don with the site. Very nice….

  39. Alex G April 27, 2012 at 9:37 pm

    For those wondering about mp3 quality affecting the efficacy of binaural beats, keep in mind that it is not literally a 10hz (or whatever frequency is being used) sound. The beat frequency is generated by playing two very close audible tones (say 500hz and 510hz) in each ear causing the brain to perceive a tone equal to their difference. As far as I know, it is generating the sound this way that encourages your brain into certain waveform patterns. Thus there is no need to worry about the beat being chopped out due to compression 🙂

    Also, awesome site Grasshopper 🙂

  40. Scott July 27, 2012 at 1:02 pm

    I am VERY interested in the reactions of those with ADD/ADHD, Parkinsons’, and strokes to this. I would appreciate anyone giving me feedback of how this program helped or didn’t, especially if you regained the use of stroke damaged areas of your brain. I am working on an understanding of regenerating neural communication by use of these types of programs and Brain Flex seems to be the best I have found. The theory makes a lot of sense, and I believe it is entirely possible, but I have yet to really hear any success stories, including ADDers.

  41. jezriel July 31, 2012 at 11:09 am

    Thanks again…. hve you ever thought about using sound to put someone to sleep? You know how when you were a kid and your mom would sing to you while you were in bed, and it would make you fall asleep? Maybe if we catalogued that whole process, we could find out how to use sound to put people to sleep.

  42. showkat sumon January 29, 2013 at 4:25 am

    thanx for ur amazing is far better than many other commercial product available in the market .i am using it with my mantra meditation and getting nice result.but there is a problem(its a problem of binaural beat also).our brain gets used to it if we use it long time like 4 to 6 weeks.grasshoper have u think to create another version of it with slight different frequency so that we can use it alternatively and get the brain no chance to used to it. Its just a request. Thanx again for this awsome free gift and also for ur image streaming method..

  43. Jezriel May 23, 2013 at 10:42 am

    I feel that this helps me calm down. I have ASD (Autism Spectrum Disorder) and this helps me relax when I get escalated. It helps guide the brain back to its natural path. It is a neural reprogramming track.

  44. David September 17, 2013 at 3:17 pm

    I have a somewhat minor case of ADHD. I was undiagnosed until the age of 18, but I found brain flex when I was 13. It’s hard to say how much it helped me back then because I wasn’t aware of why I was the way I was, but as of right now I find that sometimes it has an extremely positive effect, while other times it doesn’t have much of an effect at all. Specifically, when I feel like my medication is no longer doing the trick, (allowing me to focus, but me not choosing to focus), it tends to lift my mood from stressed and depressed to motivated and productive. It’s more of a subtle long term effect however, rather than an instant change. I use digital espresso as well. I don’t think it’s an end all solution, but it definitely has positive effects as a supplement. I just wish there were more like this.

  45. Scott June 4, 2014 at 8:49 pm

    I just checked back (Just found the link again), thanks David for answering my question. I don’t take ADD meds, I have been looking for some other alternative and was wondering if this ahd worked for you. Thanks for posting.

  46. Stv Rs January 11, 2015 at 7:39 am

    Have listened twice. In the meantime one extremely deep sleep and a strange feeling of forgetfulness.I lost my wallet in a football stadium last night (since recovered) and my mp3 player was in my inside right jacket pocket, which I never use, being right-handed. I’m listening again now, just for the hell of it.

  47. Neal January 10, 2019 at 7:58 am

    Grasshopper if you’re still around, I have a question. Does brain flex create hallucinations? I would like to know before I try listening to brain flex.

  48. Neal January 12, 2019 at 12:12 pm

    I listened to it and there are no hallucinations. I suggest to buyers and listeners that .flac only have 2 channels and .wav have multi-channels. Brainwaves sold from here uses 5 channels. I noticed a big difference from brainflex.flac and brainflex.wav, .wav gave out a full dose. I really like it.

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