The launch of the New Xbox Experience brought more than just a new interface and a few temporary Xbox Live issues. Since the new Xbox 360 dashboard hit on November 19, some HDMI-connected owners have literally been playing their games in silence.
The problem appears to afflict a select group of devices that properly handled Xbox 360 audio prior to the New Xbox Experience, such as the BenQ G2400W monitor. It is believed that the issue stems from an updated HDCP handshake--the protocol used to establish an HDMI connection--which the older devices are not compatible with.
Now, Microsoft has acknowledged the issue in a statement to Shacknews, apologizing for the "inconvenience" and noting that a fix is in the works.