There's a bug in audio xbox 360 games there's no bgp only sound effects only works when...

The Nov 27 update seems to have killed digital audio output from my 360.

The boot sound effect when the xbox logo comes up still works in full surround, but all sounds after that no longer work through the fiber optic digital audio output.

1. Yes, the HDMI port is plugged to the input on the right-hand side.

2. Yes, the HDMI mode works as it should.

The only issue is that sound can't be heard when I'm using the Xbox 360. It functions perfectly fine; games run smoothly and the inputs are spot on, but it is only the audio that isn't working.

Almost sounds like when I turn my surround sound volume up too high. The only game that I get that kind of issue on is Crysis 2. Do you have any settings on your surround sound system like a feature to compress the audio? Also,
check that you sound levels for each speaker are not set too high? The only other thing I could think of is having the optical audio cable coming out of the TV to the receiver, instead of coming from the 360 to audio receiver. But if you have an older 360,
you will have to buy this:

HDMI and optical audio dongle

I had this for a while with my black 120 GB 360, it worked very well. I was not able to find it on Game Stop's website.

I just experienced this same problem with the Nov 27, 2012 update.

The only difference in my hardware configuration is that 360 system is one of the pre-HDMI units and I am using the digital optical audio output from the XBOX 360 Component HD AV Cable to connect from the 360 to my audio receiver.

Digital audio worked fine until this latest update. After the update, the boot logo sequence still comes up with full surround audio, but after the boot none of the navigation or other sounds get passed through the digitial optical output and the only way
I have found to get sound back is to do as described above... fallback to rca stereo audio connection, which just doesn't compare and really cripples the home entertainment experience.

I am not sure if the engineers resolved the problem when it occurred with the update in Feb, but I sure hope they can use the knowledge from the previous bug to quickly fix this new one that was just introduced. Not having full digital audio makes the 360
a really bad center piece to the home entertainment system.

Here is another post that I wrote up earlier but didn't post:

Ok, I'm a little confused. Just to be sure, what is not working when:

1. Does the game audio work when the Xbox is directly connected to the TV?

2. Does the game audio work when the Xbox is only connected to the Headset?

3. Does the game audio work through the headset when the Xbox is connected to both the TV and Headset?

4. Does the game audio work through the TV when the Xbox is connected to both the TV and headset?

Note, the headset contains two different audio channels, when connected to the controller, you are receieving the Chat channel, when connected to the Xbox you are receiving the Game audio (the same that would go through the TV). The settings on the Xbox are
for Chat audio only. That should be set to headset only for when using the headset, this will cause game audio to play through both the TV and Headset while Chat audio through the headset only, if set to both game audio remains the same but Chat audio will
play through both, and of course of set to speakers then game audio will still play through both but chat audio will play only through the TV. Ideally, this should be set to headset only especially when using the X12.

As for the issues with sound, if it is your TV not producing the sound, check the settings on the TV. Make sure the connections are appropriate. You said you are using Composite, that means the standard Yellow video cable should be connected and the Red and
White audio cables need to be connected to the corresponding audio for that Video cable. Some TVs, such as my family's still strong Tube TV have 3 auxiliary sources all of which use the Composite Yellow Video cable. Make sure, if you have multiple inputs for
video, that the audio cables are connected to the correct coresponding source. For example, your TV may have Video 1 and Video 2 but if the video is connected to Video 1 and the audio to Video 2, then you will receive only Video when on Video 1 and only Audio
when on Video 2.

I'm sorry if any of this is redundant or obvious for you but the first part of this message (the 4 questions above) will better help me in assisting you further. Otherwise I'm slightly confused as to what your second post is saying. As a note, when I say game
audio, test out a game to be sure. Check to make sure volume is on on devices as well.