When the Xbox One launches later this year, the unfortunate truth is that not everyone will be able to upgrade to Microsoft's next-gen console. So one of the burning questions heading into the launch is whether or not the Xbox One and Xbox 360 will allow cross chat between platforms. While Microsoft hasn't formally announced details, Larry Hryb (aka Major Nelson) would "be surprised if this was possible."
"I've asked - based on what I know of the voice system, I would be surprised if this was possible," Nelson said on Reddit. "The Xbox One uses an all new wide bandwidth (read: better voice quality) CODEC, so I doubt they are compatible."