Music Theory 1-Intervals

we had a great deal of information about interval ,thanks guys
but no one ever told,what are they used for ,and whats their importance
in music...i always wondered why people r giving so much imp to intervals!
Can somebody tell me whats the importance of these intrvals while compsosing
a song..
nobody will mention,its major 2nd or perfect 5th when they r transcribing a song?
so why r they so important?

(this question might sound stupid to the pro's,but plse help me out)

mathai

Interval theiry is the basic for understand the music theory. Like they always say that a note repeats after 12 semitones. In whatever string instrument you take, this is the same. After the 12 semitones the next octave starts. This is the 12 semitone interval I am talking about. It's really useful if you want to have any knowledge about scales. If you can identify the root and say the major 3rd in the scale. Then you can guess it's either major or some derivative of that. Even if you dont have perfect pitch, this will help you identifying what mode a particular song lies in. Whether it's Major or Minor or Phryggian or whatever. Even if you dont identify it as A Major or A# Major, it still is a lot of knowledge and useful information. Identifying intervals by ear is the first step for practising ear training. So dont ignore this. It's a very commonly overlooked but extremely great information.

Bhai Log...Mujhey to Ye Musical Theory Samajh mein nahin aayi...Just tell me how to start
from Scratch. I dunno anything other than basic chords.

Buy yourself a good book and go with the lessons.

www.zentao.com/guitar

its a very nice link dude .. seriously

Let me know if, as a beginner, I have understood this 1st lesson correctly:

Check the picture attached...

helll mannn..i can play chords , i can play the sweet child o mine solo....but i jus culdnt get the stuff bout intervals..literally tearin ma hair. dennis mann...i think fer ppl like moi ud havta start right frm the beginnin as in...wats a note? wats scales? etc.
canya?? or theres already places here where i can get that?

awe'frekin'some post dennis....tho i know mosta dis stuff...but well "compiled" ....uve put all my theory in a page or 2)