This is like a musical jump-start. I have listened to this tape daily for weeks and it sounds different each time. My explanation for this is that I feel that our attention is often drawn to areas of resistance and as this resistance is lessened and eliminated through the healing process our focus then shifts to other areas of resistance that the music then works at releasing and so on. As previously mentioned there is a generous amount of low bass in Jim's music. A great deal of consideration went into the harmonic content of Jim's music.
Harmonics are basically the subdivisions of a string.
If a string was 10' long, the first subdivision would be in half - the octave at 5'. One reason that I like to use synthesizers in this work is that you can control the harmonics by changing waveforms - an easy thing to do on the older analog synths. The Minimoogs are excellent for this. They have three independent oscillators for which you can choose the frequencies and waveforms independently. In my studio I have a balance of analog and digital synthesizers as well as a digital sampler.