Sennheiser - e 845

To do this properly, you'd really need a professional vocal booth in your house and your PC somewhere outside of it. No amount of filters is going to make up for a crappy recording space, but you CAN make your space as recording-friendly as possible. Move your mic away from your PC. If you're singing, you're better off standing anyway. Put your mic on a stand and point it away from your PC to reject as much fan noise as possible. Add soft furnishings to the room to absorb reflections. Hand blankets on walls and put carpets on the floor. For best recording results, pony up for a decent quality dynamic vocal mic, XLR cable and a USB audio interface. Go talk to someone at your local pro audio store (NOT BestBuy, Walmart or other "gamer gear" retailer). A Shure SM-58 runs about $130 and is a classic live vocal mic. I've used a Sennheiser e845 for decades for both live vocals and recording. It's been rock solid for me. A Presonus AudioBox USB interface will run you about the same as the mic. Add a $10 XLR cable and you're in business. Focusrite interfaces have had issues with OBS. Behringer is a great budget-friendly option as well. Once you've got your gear, instal the obs-asio plugin to allow your interface to talk to OBS using the studio-quality ASIO protocol. Yes, many USB interfaces will also work as plug and play devices on Windows PCs but ASIO is a superior protocol and it allows you to use each input on your interface as a separate input device in OBS (instead of the single stereo track Windows drivers will give you). Do it right once. Pay for it once. Enjoy it for years.