Shruthi 4 Pole Mission; lp2 and lp1 too quiet

Hello everyone,

i have the 4PoleMission filterboard in one of my Shruthi´s, but the lp2 and lp1 mode is too quiet. All the other modes are normally loud. Has anyone an idea which resistors maybe i´ve swapped?

The 82k resistor is responsible for setting the gain of the LP2 and LP1 modes. Also check for bad solder joints on the 4051.

It was a bad solder point at 82K. THX