Modes are simply scales. They are obsolete nowadays. The main purpose of modes is to tell who has studied music theory and who hasn't. When people actually "use" modes, it just means that they are starting on/emphasizing a note other than the tonic. However, it's a lot easier to say "hey I'm in the C Major scale but I'm ending my melody on D." Modes are worthless pieces of craps that are just there to make music theory seem more complicated than it really is.
Hey Bandcoach, Please correct me if I am wrong about any of this since specific theory is not my strong suit... though I understand music and have studied music both on a college and graduate level, and am a professional musician/composer, I really work on an intuitive level... I learned and internalized, though do not think in "names" at this point in my life.
Which may be a bit of what you are trying to express, Rappers Friend...
anyway...
Modes are not simply scales... they are based on scales, though...
Playing with a particular mode does not mean you are starting on a different note in the scale of the key you are in.
You can play a "C Major" scale over a "C major" chord.
But you can also play the "Lydian" and "Mixolydian" modes over the C major chord.
This does NOT mean that, with the "Lydian", you just play your "C major" scale starting on the "F" note...
What it means is that you can play a "G Major" scale (on top of your "C Major" chord) starting on the "C" note. This is because the "C Lydian", which is made from the "G Major" scale, contains the notes of the "C Major" chord (C, E and G notes)...
It is similar to playing the "C Major" scale, but you raise the 4th one half step...
So instead of playing:
C D E F G A B
You play:
C D E F# G A B
Similarly, you can play the "C Mixolydian", which is based on the "F Major" scale, over your C Major chord because it also contains the C, E and G notes.
So, you would be playing an "F Major" scale over your "C Major" chord.
So instead of playing:
C D E F G A B C
You would play:
C D E F G A Bb C
...and, you do not actually have to start (or end) on "C"... you can start and end your melodies on whatever note you want. Nothing about this is telling you what note you have to start or end on... nor is it telling you what order of notes you have to play in between.
Whether you know the names or not, you can use these "modes"...
You may have just picked the noted out by ear, or stumbled on them in some other way...
But, just because you do not know the names or do not want to know the names does not mean that they DO NOT HAVE NAMES.
To say some "mode" or "scale" or anything is "obsolete" would mean that nobody plays those things anymore...
But people do still play them... whether or not some kid who walked up to the piano in his living room and started playing "C Lydian" actually knows the name or not, does not change the fact that he is playing it... and "it" has a name... regardless of whether you care what the name is or not.
If somebody asked how to spell a word (this is just a hypothetical, I am not saying you do not know how to spell), you can say to him "
spelling is obsolete, just
talk... you don't have to
spell anything... we can record audio now so there is no reason to
spell anything!"
Or maybe you know how to spell a little so when somebody asks "how do you spell
cat?", you can say "well, it is that letter that looks like a sideways horseshoe, or it might be the one that looks like when you put your hand like this, then the one that looks like a teepee with a line through it and then the one that looks like a table... and there may be one of those letters that looks like a chair or a wiggly snake."
...well, that is fine if you do not feel the need to know how to spell...
But that does not change the fact that words actually
do have proper spellings...
And it does not make "words" obsolete just because you do not care how they are spelled... you are still using them all the time.
Music theory gives people a way to express, in words, a musical idea... it does not tell you what you have to do.
Obviously the person asking the question is interested in modes, since he asked the question in the first place...
Are they "important" because they
exist... and they are used all the time... regardless of whether somebody
knows they are using them or not.