MisterDeck sliders issue

[PhoeNXRus]

Hi, I put everything together according to the instructions, but I have a problem, I use linear potentiometers, but the minimum value at which they "connect" is -42.1dB. The lowest position is defined as -inf dB, and then immediately outputs -42.1 dB. What needs to be done to make the adjustment smooth from 0 to 100%? The screenshot shows the values at the lowest position of the potentiometer, and then the step with which it works and outputs the values