Common first-line diagnostic questions.
These are starting points. Control labels and driver support must still be checked against the physical unit.
The SC220 does not appear in Windows. What should I check?
Use a proven data cable, try a direct USB port, temporarily avoid hubs, check Device Manager and Windows Sound, then retest after a restart. Record whether it appears as an unknown device or not at all.
The microphone is only on the left or right.
A microphone connected to one input is a mono source. Select a mono channel or enable mono handling in the destination application.
A condenser microphone has no signal.
Confirm that the microphone requires phantom power, the XLR cable is correct, gain is not at minimum, and +48 V is enabled after the cable is connected. Phantom power is not a universal fix for every microphone.
The audio is echoed or doubled.
Disable either direct monitoring or software monitoring. Confirm that the source is not captured directly and again through SC220 Live or a virtual cable.
The audio clips even when the OBS fader is low.
Clipping is probably earlier in the chain. Lower source output or hardware gain, check PAD/line mode, disable extra processing, and inspect meters from input to output.
Should I install a driver from an unofficial website?
Not recommended. Do not install a driver binary that cannot be clearly tied to the vendor and model. Save screenshots of the device identity first and use an official source when one becomes available.