The bit rate of the music format, which is what we call the higher the code rate, the better the sound quality and the smaller the distortion of the music. For example, our most common MP3 is basically 128kbps The code rate means that each music file will be composed of 128K (128*1024) binary digital signals per second. Relatively speaking, for a sound, the more digital signals that describe it, the more sound information it contains. , the smaller the difference between the sound and the original sound, the smaller the distortion, and the more real it basically feels to our ears.