The small word group is a line added below the treble spectrum and a line added above the bass spectrum. The staff is a universal symbol. Music is recorded by marking notes and other marks with different durations on five parallel horizontal lines with equal distance, which is one of the most widely used music scores.

What wireless music lovers must learn, everyone should learn to read the staff:

The five-line sequence of the wireless spectrum is counted from bottom to top. The first line at the bottom is called the first line, the second line counting up is called the second line, the third and fourth lines counting up, and the top line is the fifth line. The rooms are also counted from bottom to top. The bottom room is called the first room. The second, third and fourth rooms are counted from the top.

If five lines and four rooms are not enough, parallel lines can be added, such as adding one room above, one line above, two rooms above, two lines above, one room below, one line below, two rooms below and two lines below.