The embodiment of the invention provides a tone quality adjusting method. The tone quality adjusting method comprises the steps of obtaining current
volume setting;
gain value information corresponding to the current volume is determined in a volume table, the volume table records a
gain value corresponding relation under different frequencies and different volumes, and under different volume settings, the
gain value change amplitude of a low-
frequency band and a high-
frequency band is smaller than the gain value change amplitude of a middle-
frequency band; adjusting an
audio signal based on the volume table parameter; and outputting the adjusted
audio signal. According to the method, the gains of different frequency bands are optimized and adjusted, especially under the
low volume setting, the low-
frequency response of each volume level is improved, and therefore it is ensured that each step of volume can present the optimal tone
quality performance. Specifically, for low-frequency and high-frequency bands which are not sensitive to human ears, small-amplitude gain adjustment is carried out; and for a
middle frequency band which is more sensitive to human ears, gain adjustment is carried out in a relatively
large range, so that the tone quality is improved, and the listening feeling performance of each volume level is improved.