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Discussion Starter · #1 ·
I need a converter that does HDMI to 7.1 LPCM conversion. The only device that I have seen that does that is now discontinued:

http://www.switch-box.com/S_PDIF_ins...CLUX-11SA.html


Does anybody know of a similar device that works the same way or can be modified in a similar way? I am currently using a 4x2 HDMI matrix switcher with SPDIF output, but it gives me only stereo and not 7.1 PLCM
 

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Quote:
Originally Posted by krassyg /forum/post/20894191


What I am looking for is HDMI to 7.1 SPDIF output like the Meridian DSP stuff. I procrastinated buying the device I mentioned above and now it is discontinued.

Ah. BTW, that was not Meridian DSP stuff, afaik, but a a modified Octava box that many Meridian users coveted until the HD621 was released.
 

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Is this suitable - you will need to tap the i2s lines:
http://www.gomax-electronics.com.tw/CV-505.html


I had photos somewhere showing the internals. There's also a thread on AVS that discuss the chips used.


If your having trouble sourcing one let me know and I'll happily part with mine, I now use an OEM solution that has remote volume control and VFD.
 

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Quote:
Originally Posted by gooki /forum/post/20895732


Is this suitable - you will need to tap the i2s lines:
http://www.gomax-electronics.com.tw/CV-505.html


I had photos somewhere showing the internals. There's also a thread on AVS that discuss the chips used.


If your having trouble sourcing one let me know and I'll happily part with mine, I now use an OEM solution that has remote volume control and VFD.

I'm curious about that unit. Can you recall the thread title of something that would narrow down the search? If the OP isn't interested in your unit, I might well be. PM me if you want to sell it.
 

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Discussion Starter · #9 ·

Quote:
Originally Posted by gooki /forum/post/20895732


Is this suitable - you will need to tap the i2s lines:
http://www.gomax-electronics.com.tw/CV-505.html


I had photos somewhere showing the internals. There's also a thread on AVS that discuss the chips used.


If your having trouble sourcing one let me know and I'll happily part with mine, I now use an OEM solution that has remote volume control and VFD.

I would really appreciate any info or pictures about modding this unit.
 

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I got one of these that Kal suggested coming, I'm only looking to get 2 channel out of my HDMI through optical for Home Theater Bypass setup...
http://www.atlona.com/Atlona-HDMI-1....D-Support.html


But I saw mention of this device, which is discontinued that may be of consideration for you, they are still around if you search.... Thats if you can use full 8 channel RCA outs...
http://www.atlona.com/Atlona-HDMI-1....switching.html




For What its worth - I have read that the lesser price clone units that look identical to the Atlona products - don't have the same chips or SQ output...


I'm curious - does optical send out High Bandwidth Audio for all 7 channels... ?


Here is thread that a guy started on using the first ATLONA device with some good experimental thoughts.


Hope this helps....


Warp
 

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Discussion Starter · #12 ·

Quote:
Originally Posted by gooki /forum/post/20895732


Is this suitable - you will need to tap the i2s lines:
http://www.gomax-electronics.com.tw/CV-505.html


I had photos somewhere showing the internals. There's also a thread on AVS that discuss the chips used.


If your having trouble sourcing one let me know and I'll happily part with mine, I now use an OEM solution that has remote volume control and VFD.


Is it possible to take the I2S lines from the HDMI 7.1 converter and feed them directly in the I2S input of the 2x8 MiniDSP? This way you would not need to convert to SPDIF and then from SPDIF back to I2S.
 

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If the sent (from HDMI decoder) and expected (minidsp) bit depth and sample rates match, then yes you might be able to.


I believe the CV-505 up samples all channels to 192khz (not sure on bit depth).
 

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Discussion Starter · #15 ·

Quote:
Originally Posted by gooki /forum/post/20909628


If the sent (from HDMI decoder) and expected (minidsp) bit depth and sample rates match, then yes you might be able to.


I believe the CV-505 up samples all channels to 192khz (not sure on bit depth).

How can I check that? I guess I need an oscilloscope?
 

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If you have an AV receiver that shows you the input details, just check what the HDMI pass through is outputting - I'm 99% sure it'll be the same as what is going to the DACs.
 

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Discussion Starter · #17 ·

Quote:
Originally Posted by gooki /forum/post/20914511


If you have an AV receiver that shows you the input details, just check what the HDMI pass through is outputting - I'm 99% sure it'll be the same as what is going to the DACs.

The MiniDSP operates at 24 bit, 96Khz, I would be using HTPC for my playback, so I can select that set. What I meant was about the other aspects of the I2S like the two clock lines and the data line.
 
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