Please uninstall the current version of Bandicam, restart your computer, and install the latest version of Bandicam(4.6.5). https://www.bandicam.com/downloads/
Also, we recommend you reinstall the latest version of the graphics driver and then record again.
I want to record videos with my microphone on Bandicam, but when I set my microphone as the Secondary sound device, it adds an annoying crackling noise. I've done it with 2 different microphones. I tried it on the Primary sound Device but then I can't set a push-to-talk key. Help?