Little EQ is divided into three sections:

A high-pass filter is used to block out sounds that are below a certain frequency, letting only the higher-frequency sounds through. In real life, however, it’s not so precise; instead of just blocking, sounds fade out by a certain amount.

Listen to the guitar. As the high-pass frequency increases, the low frequency decreases. The guitar sounds brighter. However, if too much is cut, the guitar may sound thin.

You can adjust the sound around a specific frequency in dB by turning a knob—left to decrease and right to increase the volume. Three buttons determine the range of influence: "wide" has the most, "normal" has a moderate effect, and "narrow" has the least.

Reducing low frequencies (180hz) clarifies the sound; however, adding some low frequencies may enhance an instrument's "body." Boosting mid frequencies (4.8K) increases "presence" and "prominence." If the guitar sounds too sharp or harsh, you can adjust it by modifying the high frequencies.

In terms of high frequencies, it functions as a filter similar to a high shelf, which adjusts the volume around the selected frequency. However, unlike mid and low frequencies, sounds above this frequency will also be affected, so there is no option to set the range of influence. 

By decreasing the high frequencies, we cut the harshness from the guitar track. It sounds darker and smoother. Can we add back the in-your-face sound without losing the smoothness?

We can add saturation.