Guitar national standard
Using the twelve average tuning system.
2, Standard sound
Small word a group of sound is 440Hz, should meet the GB / T 3451-1982 requirements.
3, Pitch error
The pitch error of the sound of the advanced product should be within the range of -10 to +15; the pitch error of the sound of the product in the ordinary product should be within ± 20 minutes.
4, The basic range
E ~ a².
5, Set the string treble
6 string: E, A, d, g, b, e1.
12 string: e, E, a, A, d1, d, g1, g, b, b, e1, e1.