Originally Posted by gabrielcab
Is there an option to make on my AVR to not pass the HDMI information from my TV to my Computer?
Ah, I misunderstood your question. Your receiver will always add its audio capabilities to the TV's information (EDID) and pass that to your computer. If you're trying to bitstream audio formats like DTS-HD or Dolby TrueHD from a Blu-Ray disc you need several things.
Your video card needs to support these formats. Older video cards only support lower bandwidtth SPDIF compatible audio formats like Dolby Digital and DTS.
You need to select the HDMI audio output device instead of the motherboard's onboard soundcard. Right click on the speaker icon in the taskbar notification area and select Playblack devices. Select the device with HDMI in the name, and push the Set Default button.
The media your playing needs to be encoded in an audio format that both Windows and your receiver support for bitstreaming: DTS-HD, Dolby TrueHD, Dolby Digital Plus, Dolby Digital (AC-3), DTS, or PCM. Any prerecorded Blu-Ray or DVD disc should meet this requirement, but media files can use other unsupported formats like AAC.
Finally, your media player software needs to be configured to bitstream the audio rather than decoding itself.
Note that there's usually nothing wrong with letting your media player do the decoding. For the lossless "HD" formats, DTS-HD and Dolby TrueHD, you media player will decode the audio to the exact same PCM values that your receiver will. For the other lossy formats there's no reason to believe your receiver will do a better job of decoding them than your media player.
If your PC is outputting multichannel PCM to your receiver then you don't need to anything. Bitstreaming the audio to the receiver will let it display the audio format being used, but it won't improve the audio quality.