What is the Nashville Number System you may ask? It is a common music chord “language” that, I assume, developed in Nashville in the recording industry.
In my own music circles we have been using this lingo already… and I never really knew what it was “officially” called, only that it was rather universal among serious musicians and could be found in modern instrumental instructional manuals. The system allows chord progressions in music to be expressed in key-less terms, using numbers and their relative position from each other to express the chords in a progression of music in a given key. For example, in the key of C, instead of saying that a progression is C - G - Am - F you would call this 1 - 5 - 6 - 4, or using the sometimes alternate Roman Numeral variant, I - V - vi - IV. Dig?

Web designer and developer. Loud discerner. Software engineer and 
whoever explained it did it well. I am a 16 year, i played music all of my life, i am leaving in nashville, tn playing with some mean guitar players, rick mcrae, mike crosno, and some others, but what i getting at u really need to stress to people to learn scales. Maybe the modes thats a joke have fun.
Umm… I’m not exactly sure of everything you were saying. but it sounds right.
I’ve found that learning scales is indispensible when you want to be a competent lead player. You need to know where to go in any key and you need to know what chord shapes and voicings will fit into your progression. The Nashville system helps, too, because you don’t get stuck having to think of this in terms of specific notes and keys… just relative positions.
Today I found your website, I will go there often. It is so informing. Thanks