no manual settings possible for Chromecast audio output => incompatibiltiy with older TV sets

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Try to cast MKV video + 5.1 audio to older 5.1 capable TV, in this case 
Philips 46PFL9704H/12
2. 5.1 LC-AAC is used as audio stream
3.

What is the expected output? What do you see instead?
Expected output: 5.1 audio, received output: 2.0 stereo

What version of the product are you using? On what operating system?
1st generation Chromecast, iPad + DS Video or Xperia Z1 + Google Play

Please provide any additional information below.
Trying to stream MKV + 5.1 LC-AAC to my Philips TV, I receive only 2.0 audio. 
When attached to a newer Panasonic TV, the same configuration gives 5.1 output. 
I can also reach 5.1 output when I connect my PC directly via HDMI to Philips 
TV as I can enable 5.1 (DD) in the Windows driver for the HDMI connection. So I 
figure that it must be a problem with Chromecast not recognizing the output 
HDMI sink as being capable of 5.1 throughput.
Now, what I'd like Chromecast to have is a settings page where one could 
manually try some output settings for his own TV set, especially for older 
generation TVs like mine. (disable the internal resampler, set 5.1 
compatibility manually etc)

Original issue reported on code.google.com by cirk...@gmail.com on 6 Oct 2015 at 11:01

[GoogleCodeExporter]

We're looking into it.

Original comment by jonathan...@google.com on 9 Oct 2015 at 4:26

• Changed state: Acknowledged

[GoogleCodeExporter]

This is a known limitation with some TV models. You may be able to find more 
help at the Chromecast online forum: 
https://productforums.google.com/forum/#!forum/chromecast.

Original comment by jonathan...@google.com on 13 Oct 2015 at 4:56

• Changed state: NotSDK

[GoogleCodeExporter]

OK, bummer! :-( Thanks anyway for looking into it.

Original comment by cirk...@gmail.com on 13 Oct 2015 at 7:25