hello, which string does the number represent, and the letter represents the tone. The standard sound of guitar from 6 strings to 1 string is EADGBE, while Kotaro Oshio's Canon is changed to DADGBD, that is to say, six strings drop by one degree and one string drops by one degree. I'll teach you a way. After tuning, it should be the same as the 5-string empty string sound. The sound of two strings and three strings is the same as that of an empty string. Just keep the strings of 6 and 1 low-key according to this.