Because Psychoactive Sound is so powerful, some people have the impression that it
requires expensive equipment to work. But amazingly all you need is an MP3 or CD
player and a pair of ordinary headphones. The special rhythmic pulses of Psychoactive
Sound are embedded in the audio using a new technology that requires nothing more
than a pair of stereo headphones to be reproduced.
You can even use Psychoactive Sound without headphones so long as you have
stereo speakers. However, I recommend using headphones because they help isolate
you from ambient sounds that may interfere with your brain's ability to synchronize
with the embedded frequencies. This is especially true when you are trying to fall
asleep.
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