5.1 surround sound through wireless HDMI
I have a PC with a Logitech Z906 surround sound speaker system and they work well together. I later bought a 55” Samsung HDTV (Model# UN55H6203AF). Due to the distance and the room structure, it very hard to drag HDMI cable from the study all the way to the living room, and I don’t want to setup another computer just for the TV, so I bought an iogear Wireless HDMI Digital Kit (Model# GW3DHDKIT). Everything works just fine. Sometimes interference could cause a bit of noise and frame drop, but for most of the time, I’m very happy with the result. I could watch videos and play games on the big screen with a wireless keyboard remote and a Bluetooth controller.
Recently I realized the Z906 is a waste in the teeny-tiny study. I have to keep the volume around 45% all the time so it doesn’t blow out my ear drum. I moved the speakers to the living room and hope to enjoy surround sound with the big screen.
The TV only has 2 internal stereo speakers, so the HDMI as a playback device has only stereo speaker as an option. My immediate thought is to somehow force 5.1 audio through HDMI and then split the audio signal out before it reach the TV, so I bought an audio splitter with HDMI input/output and optical/coaxial audio output.
My signal path is like this:
PC Nvidia GTX760 HDMI-->Wireless HDMI transmitter-->Wireless HDMI receiver-->HDMI audio extractor -->coaxial cable-->Z906
I also tried the method in the thread "EDID Overrides to solve bitstreaming issues for ATI 5xxx's". I tried all 4 Samsung EDID override with (*) mark. They all give me 5.1 speaker options in the HDMI playback setup, but none of them works for real. I only get sound coming out of the front L/R speakers.
In the end, I somewhat got it to work with potplayer. The software can encode audio into AC3/DTS format and then output the sound. I get surround sound with correct speaker orientation with this method. The only down sides are: 1, Audio will delay for a few seconds when first start playing the video or when pause and restart the playback, but otherwise fine throughout once it kicks in. I assume the software encoding caused the delay; 2, Playback volume cannot be controlled from the software or the computer. I have to adjust the Z906 console which involves another remote controller; 3, I have only stereo audio when playing games, no more sweet multichannel PCM.
So, my question is: what to try next?
I thought about buying an AVR, but don’t have the budget. Also, I’m not sure if the problem is with the wireless HDMI transmitter, or the HDMI audio extractor, or the Z906.
Could I force multichannel PCM through HDMI?
If so, would iogear wireless HDMI transmitter pass that through? The official website is not very clear. It just says ”Up to 5.1 channels of surround sound” and didn’t mention about what kind of format.
Does Z906 take multichannel PCM format from coaxial input, or does it have to be Dolby or DTS format? If it’s the later, should I get another device to transfer audio signal from coaxial to analog?
I’m not sure if my thoughts are on the right track. Any advice is very much appreciated. Thanks.