Sometimes my microphone will pick up no sound, such as when I'm trying to record audio for Skype. When it does pick up noise, it's like this: http://vocaroo.com/i/s0d54SnnCOoY
I've scoured through other threads with microphone problem troubleshooting without luck. All of my drivers are up to date, including all optional updates.
product name: HP Envy m6
product number: n010dx
OS: Windows 8.1