Frequency response range introduction
The frequency response is an evaluation criterion for the frequency response capability of the digital-to-analog/analog-to-digital converter of the MP3 player. A good frequency response is that a stable enough signal can be output at each frequency point, and the signal sizes of the different frequency points are the same. However, in the low frequency and high frequency parts, the reconstruction of the signal is difficult, so there is usually a decay in both frequency bands. The better the output quality, the flatter the frequency response curve, and vice versa. Not only does it decay very quickly at high and low frequencies, but also in the general frequency band.