Q: What to do if I hear no sound through the headphone jack of K670 microphone?
A: So you just need to make sure the output setting of computer is select as USB Audio Device/MIC-TEST and the volume is not muted. Then you will hear the sound from the headphone jack of the mic.
Q: No sound on my Mac!
A: 1.Check whether the icon of the “USB PnP Audio Device"/"MIC-TEST" appears or not.
2.If yes, then you’re good to go. But you can’t hear any playback of the mic before you click open an audio software (like QuickTime Player) on Mac OS.
Q: After upgraded to Windows 10, the microphone doesn't work!
A: If “USB PnP Audio Device”/"MIC-TEST" under “Recording Device” appears but the level meter doesn’t move when speaking, simply go to Setting→Privacy→Microphone, and set it to allow apps to access to microphone as well as the other apps below, especially the "Voice Recorder". At lasts restart computer.
Q: Microphone doesn't work with my Skype!
A: 1.Check if it's problem of the mic or Skype. Get to sound setting to see if the “USB PnP Audio Device”/"MIC-TEST" is listed as the default input. If not, then no further step, just send us a message.
(Windows: Right click speaker icon on right corner of computer→“Recording Device”
Mac: Click “System Preferences”→“Sound”→“Input”)
2.If driver is there and the level meter moves when speaking to mic, it will be the bug of Skype. The easiest way is to update Skype to latest version or re-install the latest Skype.
3.For Windows user, before the update or re-installation, you can go to Setting→Privacy→Microphone, and set it to allow apps to access to microphone, at lasts restart computer.