If you own an Xbox 360 HD DVD player, you may want to get ready. we just got word that there's an update scheduled for the device sometime today.

According to a post on the AVS forums by Amir Majidimehr, corporate vice president for Microsoft's Consumer Media Technology Group,

It is my pleasure to let you all know that the HD DVD update for Xbox 360 is slated for release on 5/15 (i.e. tomorrow!). So when you wake up in the morning, you should be able to upgrade your software. And me free from telling you when are going to get it . Hope you all download it and provide feedback on what you think!

We have no word yet on what's going to be in the update, but as soon as we get wind of what's in store for HD DVD player users, we'll be sure to let you know. Until then, check to see if there's an update on your respective boxes, alright?

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Over at the AV Science Forums, we found word from Dr_Know on what will be the updates included for the HD DVD audio come May 15th. Mind you, this list is entirely separate form the Spring Dashboard update that was released last May 7th.

Anyway, why don't you check out the full list so you'd at least have an idea of what we're waiting for:

• Fix DD being stuck in "Night Mode" which is essentially Dynamic Range Compression leading to the sound sounding very flat
• Option to output ALL HD DVD audio as DTS 1.5Mbps (list includes DD+, TrueHD, DTS, and any other audio option offered on HD DVD discs I may have missed)
• Option to output ALL HD DVD audio as DD 640Kbps, (which it currently does, but will be fixed from the Night Mode bug), list includes DD+, TrueHD, DTS, and any other audio option offered on HD DVD discs that I may have missed.
• Option to output ALL HD DVD audio as WMAPro 1.5Mbps, (list includes DD+, TrueHD, DTS, and any other audio option offered on HD DVD discs I may have missed) for those receivers that support WMA.
• Option to enable/disable Night Mode (with the default set to off)
• Fix a number of disc incompatibilities (including DVD Essentials) as well as a number of Lip Sync issues.