low sound input on hifi berry DAC+ADC (not pro)


I have been trying to record my LPs using SOX and stream the audio to another raspberry pi with the digital audio hat. The issue I am facing is that the sound input recording is too low. I know the hifi berry ADC + DAC has a set of jumpers (number 4) to increase the input volume by +12db and +34db.


However, the pin indication is not very obvious to me. I found this instruction on how to connect a microphone:


is this setting for 12db or 34db? is there a way to make smaller increments in the regular hifiberry dac+adc?


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