At our church, we use the Nashville Number System for chord charts. This makes chord charts easier to use by making them universal for any key. For example, a song may be in the key of A. One guitar player might play in the A shape while another guitar player may capo the second fret and play in the G shape. In using the Nashville Number System, you simply call out the numbers and it is the same to both guitar players. Another example would be if a musician learned a song in one key and a vocalist needed to change the key. With the Nashville Number System you can easily change the key while the numbers remain the same. You will no longer have to transpose a chord chart. The Nashville Number System is a universal system for any musician.
To explain things a little better, I wrote an introduction to the system.





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