(Taken from a post I made on http://www.hipforums.com/ in 2009)
Harmonics are the ratios or relationships between two or more waveforms, the sum of which can produce an output of harmony or imbalance. This relationship of frequencies can be experienced through many forms, such as nature, music, art, astrology, architecture and mathematics.
A lot of psytrance can be seen as a carefully constructed harmonic balance of virtual sounds. When experienced in the right circumstances, this type of music can create a means of therapeutic escapism, via the induction of alpha brain states.
The alpha state (8 cycles per second) is the frequency at which the other 90% of your brain becomes active, This is also the frequency at which your DNA repairs itself, you can begin to access your sub-concious states and abilities, and you electromagnetically and psychically connect through the aether of the planet with all living things. The source, the whole, the oneness.. the Singularity.
The tempo range of psychedelic trance works to binaurally entrain your brain's frequency to the alpha state, with the 4/4 pulse combined with the 16th note bassline at specific tempos... ancient shamanistic techniques, evolving simultaneously and symbiotically with the age of technology. A computer-driven millisecond perfect pulse, combined with journey inducing psychedelic stimulus and audio tricks take the listener into an altered state of conciousness.
The effects of this psychedelic musical dimension are experienced both externally and internally, physically and mentally, which, from my experiences, creates a bridge between both the physical and metaphysical planes.
The ramifications of these dimensionally bridging experiences can be life changing and transformative for many of us. I believe that as we are 80% liquid crystal state (water) we are charged like crystals; receiving, storing and transmitting positive and negative charge.
I see it very important to put positive charge into this music, at the producer's end, and do a solid job in your craft. The geometric structure of music holds true spiral form, through the octaves and exponential frequency curve, which means it is a true reflection of the creative processes of nature, DNA and the micro/macrocosm. These harmonically structured reflections of nature are what create this 'extra' dimension, which stimulates your entire brain during the listening experience. This causes deeper effects and experience than we can ever consciously recognise.
Image: Electrypnose - 'Where Do We Go?' (2CD) - a perfect example of the type of PsyTrance referred to in this article.
http://www.electrypnose.com/