Recently, I found out that a considerable amount of scientific research that has been done on music and its effects. This research has confirmed what I already knew about music by the Spirit of Christ. The following are somewhat condensed (and no findings of science are ever 100% conclusive, nor do they claim to be) but we can still see a lot in this research:

Classical music causes significant improvement of physiological parameters. It causes behavioral improvement and coordination improvement. It increases the ability to complete tasks neatly and quietly, and increases concentration span. Attention-seeking activities are decreased.  
 
Exposing babies to music, early in pregnancy, seems to have an effect on them.  
 
Music Alters Children's Brain-waves. Children exposed to classical music have an increase in a part of the alpha rhythm frequency band and, greater similarities ("coherence") between different regions of the cerebral cortex, most pronounced in the frontal lobes. Greater coherence is thought by some workers to indicate better "cooperation" among brain regions but others view it as typical of increased relaxation.  
 
Listening to Mozart (compared to relaxation instructions or silence) produced a brief but significant increase in performance of a spatial IQ task in college students.

 
Certain types of music have been shown to have the ability to increase memory and recall.  
 
Special pieces of music (including The Blue Danube) aid hens in laying more eggs and can help cows to yield more milk.

Wheat will grow faster when exposed to special sounds.

Putting rats into two connected boxes and piping rock into one box and Bach into the other, the rats choose Bach music over rock. They move to the Bach box. When the type of music was switched from one box to the other, the rats will move again from the rock to the Bach box.  
 
When different groups of mice are subjected to the sound of traditional voodoo drumming (the same as contemporary rock drumming), to Strauss waltzes, and to silence, the groups that were subjected to either silence or Strauss waltzes have no problem learning a maze, with the Strauss waltz group having a slight edge in performance. However, the voodoo group performs progressively worse over the period of time they are exposed to the syncopated rhythms and eventually becomes so disoriented that they are unable to complete the maze at all. They become hyperactive, aggressive, and often cannibalistic.

 
The brains of the voodoo mice have highly abnormal neuronal growth patterns and chemical imbalances in the parts of the brain that are important to learning and memory formation.  
 
All of the muscles in the entire human body go weak when subjected to the "beat, BEAT, beat, BEAT" rhythm, which is found in ancient voodoo music and is also found in many modern forms of contemporary music.  
 
All of the muscles in the entire human body go weak when subjected to the "stopped anapestic beat" of music (beat, beat, BEAT, silence) in 4/4 time, which is very prevalent in popular music. This is like: "We will, we will, rock you."

Anapestic beat causes switching, the actual symmetry between both of the cerebral hemispheres is destroyed causing alarm in the body

These particular beats (that we know is rock) cause or contribute to the following:

Drug-like stimulation

Addictive behavior to a certain type of sound

Inability of the body to discern between what is harmful and healthy

The body seems to prefer that which is destroying it

Brain washing

Sensual excitement or lust

Aggressive behavior

Recklessness

Increased pride

In Children

Lessened work performance

Learning and behavior problems

Decreased performance in school

Hyperactivity

Restlessness

Improvement when they stop listening to these beats

In Adults

Decreased work output

Increased errors

General inefficiency

Reduced decision-making capacity

A vague feeling that something is wrong

General malaise

unexplained loss of energy

Shrill frequencies prove to be harmful to the body.

Ostinato: repetitive sound patterns, often mindless, induce a hypnotic state.

Loudness of certain types of music creates an actual physical addiction because of the chemicals that are released into the blood stream. The victim becomes dependent on hearing loud music with specific types of sound patterns, and has a form of withdrawal if unable to have a sustained period of listening at a loud volume. This is true of Heavy Metal, as an example.

Lyrical ambiguity is used in many songs, just as it is used to promote evil in new age neurolinguistic hypnosis techniques. Lyrical ambiguity is found in cross-over music, which purposely attempts to use words and phrases that have more than one meaning.

Some music is created to replicate the use of certain drugs or alcohol.

Here is an interesting fact: Even at low levels, the music is still has these destructive effects. Music even has an effect even with the ears completely blocked.

Since Music Has Transforming Power For Good Or Evil, What Do Christians Need To Do? (Go)  
How Can Christians Discern Between Good And Evil In Music? (Go)  
What Are The Characteristics Of Spiritual Music? (Go)  
What Are The Elements Of Worldly Music? (Go)  
What Has NPR Said About Demonic Music? (Go)  
How Was The Music For FreeGospelMusic.Net Created? (Go)  
What Research Has Been Done On The Effects Of Certain Types Of Music? (Go)  
Worship is not an outward show (Go)  
Spiritual Music Examples (Go)