UR44C- Gain at ZERO but signal still comes through

I have never had this issues ever on any other interface.

I turned down the gain of input 3 which has my synth plugged into it and I still get tons of signal.

Also one time I was recording vocals and even though the main output knob (for my studio monitors) was all the way down, there was a healthy amount of signal and you could hear the track .

I have been making music a long time and have always been able to turn a knob to ZERO and have ZERO input/output.

Is this a hardware issue? Or software? I use Cubase Pro 12. Can deleting the DSPfx suite software solve this? I just need a normally operating interface like all mine have been over the last 15 years…

Maybe your faders are not fully closed in the dspmix software?

The left position of the gain knob means +6dB amplification in Mic sensitivity setting.
The line level settings range from -10 to 44dB.
It isn’t a volume knob. That is a normal behavior of preamps.

I was told that but having owned many units over the years, Ive never turned a knob all the way left and had a signal. This happens with the main output to my monitors too. I can hear a little bleed through. Ive not had this issue on any other interface. I changed the setting to -10db too. I have the gain knobs, the cubase mix console in knob, the dsp mixer knob all doing the same thing. What a mess?! That not including volume/gain on an external unit/inst

My Focusrite never did this. all the way left was zero input…same with all units Ive owned.