I was pretty annoyed by Logitech G430 microphone playback. The sound is great, but it was ruined by noise coming from microphone. I said 'was' because I have found a way to disable it. So, here how you can do it.
- Right click the speaker button, choose Playback devices.
- On Playback tab, click Properties on Logitech device.
- Under Levels tab, set the Microphone slider to 0.
Voila! Now you will not hear your voice or any kind of distraction anymore while hearing music & gaming.