Audio Headphone audio on laptop

Hello, I have a brand new ASUS laptop with REAltek and WINdows 8.1. The frustrating issue I have is that my headphone audio sounds as if there is an echo-like sound to it. More like a sewer-pipe. I have restarted the audio programs under computer management. set the default in REALTEK to 16 bit 48000, and all devices seem to be operating fine. I even uninstalled SKYPE as suggested.The test in REALTEK is also okay. Please, any assistace would be more than appreciated.