[ 1 | 4-1 | 8套弦[一套4根] ]
[ 1 | 2-3 | 4套弦[一套4根] ]
[ 4 | 4套弦[一套4根] ]
[ 4 | 4单根E弦 ]
[ 4 | 4单根A弦 ]
[ 4 | 4单根D弦 ]
[ 4 | 4单根G弦 ]