I have my Focusrite 2i4 connected to my laptop via USB. Audio comes out of the PCs USB to the 2i4. From there I send the Left and Right audio via the two TRS jacks on the back to a mixer. Happy days., Works a treat.
Next, I plug a line level instrument into one of the inputs on the front of the 2i4. I can set it's input gain to make sure it is not clipping via the green/red lights around the gain knob. However it makes no sound. I can see the sound is coming in but nothing comes out of the TSR outputs on the back.
Am I missing something here? I thought this was a basic function of the 2i4. Isn't this what the '2' in '2i4' stands for?