This course is actually the reason people are very interested in music in the first place. Music is such a pure expression, and so too, is singing. The whole purpose of studying vocal technique and music theory is to develop an adequate vocabulary to express what we feel at the time.
There are no rules for expressions. There are only a transfer of emotion. During the emotion is removed, you have a look! But there are laws to follow a good basis for expression in music. These are: the consistency of tempo and pitch consistency.
Consistency of tempo: this, for musicians, such as the canvas for a painter. It is a surface in which we create and develop ideas. Just as the painter, the canvas we do not have to change every few seconds. This is a good rule to follow.
Consistency of the field: "pitchy" is a word too often used much now, thanks to programs like "American Idol". Drawing from the analogy of a painter, we can say that this is the color of the piece. Must have a certain color theme, and all colors must match the theme. A painting of a dark, dreary would be destroyed by a dash, a sudden out-of-the pink spot in the middle of a job.
So it is with music - a song with a mellow tone Eb will be destroyed by a strong record of his time in beats. We call it the key signature in music and we tend to remain in the main theme or color pieces.
This, if followed, creating something that listeners can understand. Constant tempo and key to provide some basis that the listener can hold on, while exploring the ideas expressed above. Once again, the familiar analogy of painting on canvas.
That being said, the singer is currently too focused on the field. Sing in perfect pitch is all the rave now. Not that there's anything wrong with it, but the consequence was that all the songs started to sound the same. This Autotune effects, and sounds more expressive than cosmetic.
The artists of previous generations used to not care too much about the rules. They are more focused on the expression. And boy, do they get good results. Jazz is based on deliberately deviate from the natural primary key, in which all the notes sound 'right'. Beatles songs have the occasional diminished chord, which sounds terrible on their own, but in the right context is magical.
This applies to the singer as well. The older generation of singers rarely used "correctly" sing pitches. Sharped or flatted their records to express the emotion of the song. They also include the effects that are common in everyday speech such as shouting, moaning, whispering, asked, surprise, and the entire spectrum of human emotion.
Emotion and expression is lost in the current production style, which uses software to even out the field and remove irregularities. This makes no sense to me from the standpoint of expression. People who are happy may be a little sharped pitch. People in a mellow mood may go flat. This is not always heard in the untrained ear (which is why I decided to teach myself the perfect pitch), but such effect occurred in the hearts of the listeners.
That's why the songs are older so green, because they speak to us in ways we can relate as a human being, with imperfections here and there. The songs today are so made that they feel artificial. Such as tomatoes from the supermarket that looks good but has a flavor does not compare, not perfectly round, home-grown tomatoes.
When you become an accomplished vocalist with reading this article and get the recommended program, be sure to remember this point when you are actually out there singing. Take advantage of out of "humanitarian" you - I know, it's a new word I came up with a second ago - and do not be afraid to use unconventional sounds in your singing.