You can adjust the bands by changing the ‘start of mid band’ and ‘start of high band’ float values inside the module (these are both in hertz). As a brief example: if the ‘start of mid band’ float is 880 and the ‘start of high band’ float is 5000, then the low band will be 0-880hz, the mid band will be 880-5000hz, and the high band will be 5000hz to half the sample rate.

3 Band EQ