How to turn on your microphone

If the system shows "Use your microphone", choose "Allow".
If you choose block by accident, click the icon on the right side of URL bar, and choose "Allow VoiceTube using your microphone".
Or you can click "Settings" on Chrome, and choose "Advanced".
Under "Privacy and security", click "Content settings".
Click "Microphone", remove VoiceTube from exception and allow the permission again.