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Transcoding Surround speaker issue in 2.2.0

Any issues that are tvOS specific
brians
Posts: 23
Joined: 10 Dec 2015, 05:08

Re: Transcoding Surround speaker issue in 2.2.0

Post by brians »

Just tried the new TestFlight build and the Center channel dialog seems to be coming more towards the left channel still.

I can hear the difference by playing a DD5.1 file while toggling enable passthrough in the audio settings.

I downloaded a DTS test file and then right channel sounds a bit different than left - like maybe higher pitch. Also the rear right doesn't produce any sound while the rear left does. Center channel still seems to lean towards the left.

File I also used to test is here.

https://drive.google.com/file/d/0B4nYAK ... ef=2&pli=1


MrMC… Settings,System, Audio output:

Number of channels 5.1
Output configuration Optimized
Stereo up mix: not selected
Boost centre channel when downsizing: 0 dB
Resample quality: Medium
Keep audio device alive: 1 minute
Enable audio DSP processing: not selected
Play GUI Sounds: only when playback stupid
Enable passthrough: selected
Dolby Digital (AC3) capable receiver: selected
DTS capable receiver: not selected
brians
Posts: 23
Joined: 10 Dec 2015, 05:08

Re: Transcoding Surround speaker issue in 2.2.0

Post by brians »

Latest build May 31 still does not solve issue. Seems like no improvement since last build.
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davilla
Team MrMC
Posts: 4377
Joined: 26 Oct 2015, 17:01

Re: Transcoding Surround speaker issue in 2.2.0

Post by davilla »

you have a mrmc.log with debug enabled ?

others reported this as fixed.
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davilla
Team MrMC
Posts: 4377
Joined: 26 Oct 2015, 17:01

Re: Transcoding Surround speaker issue in 2.2.0

Post by davilla »

brians wrote:Latest build May 31 still does not solve issue. Seems like no improvement since last build.
1 dollar says you have atv4 audio set to "DD 5.1" :)
Try changing it to 'Best Quality'.

I see what it is doing. have made a change and will push up a new testflight today. The change is risky. On the ATV4, there is a API call to get maximumOutputNumberOfChannels. There is no API to get the ATV4 audio setting but it can be inferred by maximumOutputNumberOfChannels

1) maximumOutputNumberOfChannels = 2 -> audio set to 2 channel
2) maximumOutputNumberOfChannels = 6 -> audio set to DD 5.1
3) maximumOutputNumberOfChannels = 8 -> audio set to best quality

When 2), the audio channel mapping is changed to DD mapping.
cosmoxl
Posts: 1759
Joined: 12 Dec 2015, 14:16

Re: Transcoding Surround speaker issue in 2.2.0

Post by cosmoxl »

davilla wrote:
brians wrote:Latest build May 31 still does not solve issue. Seems like no improvement since last build.
1 dollar says you have atv4 audio set to "DD 5.1" :)
Try changing it to 'Best Quality'.

I see what it is doing. have made a change and will push up a new testflight today. The change is risky. On the ATV4, there is a API call to get maximumOutputNumberOfChannels. There is no API to get the ATV4 audio setting but it can be inferred by maximumOutputNumberOfChannels

1) maximumOutputNumberOfChannels = 2 -> audio set to 2 channel
2) maximumOutputNumberOfChannels = 6 -> audio set to DD 5.1
3) maximumOutputNumberOfChannels = 8 -> audio set to best quality

When 2), the audio channel mapping is changed to DD mapping.
so then is it advised that users who have devices that can only take DD 5.1 (not multi channel PCM) still put their ATV setting to best quality and use the transcoding function built into MrMC?

If so I don't see how that's viable. That would mean that audio from any other program wouldn't work for them.
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davilla
Team MrMC
Posts: 4377
Joined: 26 Oct 2015, 17:01

Re: Transcoding Surround speaker issue in 2.2.0

Post by davilla »

no one said that :)

There are about a billion different ways to handle all the various configurations. Trying to understand the common setups and get them right.
brians
Posts: 23
Joined: 10 Dec 2015, 05:08

Re: Transcoding Surround speaker issue in 2.2.0

Post by brians »

davilla wrote:
brians wrote:Latest build May 31 still does not solve issue. Seems like no improvement since last build.
1 dollar says you have atv4 audio set to "DD 5.1" :)
Try changing it to 'Best Quality'.

I see what it is doing. have made a change and will push up a new testflight today. The change is risky. On the ATV4, there is a API call to get maximumOutputNumberOfChannels. There is no API to get the ATV4 audio setting but it can be inferred by maximumOutputNumberOfChannels

1) maximumOutputNumberOfChannels = 2 -> audio set to 2 channel
2) maximumOutputNumberOfChannels = 6 -> audio set to DD 5.1
3) maximumOutputNumberOfChannels = 8 -> audio set to best quality

When 2), the audio channel mapping is changed to DD mapping.
I'll try that when I get home from work, thanks.

Brian
brians
Posts: 23
Joined: 10 Dec 2015, 05:08

Re: Transcoding Surround speaker issue in 2.2.0

Post by brians »

Changing to Best Quality did not make a difference.

Will wait for next testflight.
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davilla
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Joined: 26 Oct 2015, 17:01

Re: Transcoding Surround speaker issue in 2.2.0

Post by davilla »

new testflight is out.
brians
Posts: 23
Joined: 10 Dec 2015, 05:08

Re: Transcoding Surround speaker issue in 2.2.0

Post by brians »

davilla wrote:new testflight is out.
Testing this morning before I went to work seems like it may be fixed now. I will do some more tests and report back.
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