improve the output level of audio signals. The auxiliary volume of Music Knight T2 can improve the output level of audio signals, thus increasing the volume. This may be very useful for users who need higher volume, such as when using headphones or speakers in noisy environments. At the same time, it can also help drive some hard-to-push high-impedance headphones and provide a better listening experience. Besides increasing the volume, the auxiliary volume can also improve the audio quality. By increasing the output level of the signal, the auxiliary volume can make the bass and treble clearer and brighter, while reducing the problems such as distortion and noise. These advantages can make audio sound more realistic and natural.