heandras wrote:Hsh, thank you for making the piece accessible for download. I wonder if it also works for persons who have problems with their ears (like me). My left ear is much "weaker" than the right due to a health problem. I read the 4 Hz sound is generated through "binaureal beats" -slightly differing frequencies in each ear. What if the tone in one ear has significant lesser volume, does that work too?
An alpha/theta/delta metronome differs from a binaural beat. The metronome is simply a sine wave, for example, at a certain frequency of one cycle per second. So if I take 4hz, the metronome come out to 4hz * 60 = 240bpm (click...click...click...). A simple program that uses FM synthesis can pull this off for you.
A binaural beat is a bit different and more difficult to produce. The binaural beat is made up of two different frequencies, one applied to each ear. The brain synchronizes the difference between the frequencies and you get a beat just like the metronome only you don't hear it. Your brain is still going to synchronize the beat even if one ear is weaker than the other - no problemo.
I suppose the straight tapping of the metronome can annoy some people. I'll put up a another file using a straight theta binaural beat and not the metronome.
As for headphones, they are a MUST with binaural beats. You can probably get away with a theta metronome on speakers, but headphones does enhance the experience. You might just burn the mp3 to a CD and listen to it through a CD player or stereo if you can.
namaste,
sakash