According to the key position of accordion instrument in Baidu Encyclopedia, accordion 96 bass refers to 96 keys on the left hand, with six rows of * *, namely contrapuntal bass, basic bass, major triad, minor chord, dominant chord and minus seventh chord; 80 bass means that the left hand has 80 keys and five elements of * * *, namely contrapuntal bass, basic bass, major triad, minor chord, major chord and minor chord. Because the minus seventh chord is rarely used, the 80 bass organ is more suitable for beginners.
The double bass is one of the indispensable instruments in the band. It mainly plays the bass part in the band and sometimes improvises solo.