More > JRiver Media Center 23 for Windows
Request change in handling of multi-channel
JimH:
--- Quote from: Fitzcaraldo215 on February 08, 2018, 09:43:44 am ---Mch SACDs, for example, exist as both 5.0 and 5.1 mixes. However, the Channel metadata tag value on the disc is either the integer value 5 or 6. But, 6 is not the same as 5.1 and JRiver interprets it as a 6.0 recording with no sub channel, causing the channel misassigment.
--- End quote ---
Would it be correct, in your opinion, to interpret 6 as 5.1? If everyone agrees, we should be able to do that.
Fitzcaraldo215:
--- Quote from: JimH on February 08, 2018, 11:20:56 am ---Would it be correct, in your opinion, to interpret 6 as 5.1? If everyone agrees, we should be able to do that.
--- End quote ---
Jim - that would be fine by me, and it might help current and future users avoid the Source Number of Channels trap. Unless someone has a lot of 6.0 BDs or other formats - DVD maybe, but I doubt it - it should not cause a major problem.
RD James:
I think the issue here is the difference between DACs, which are 'dumb' devices, and an AVR or a Sound Card.
With a 'dumb' device like a DAC, each channel has a fixed assignment, typically:
1 - Left
2 - Right
3 - Center
4 - LFE
5 - Side Left
6 - Side Right
7 - Rear Left
8 - Rear Right
So if you send them a four channel source, they map the Rear Left/Rear Right channels to Center / LFE (channels 3 & 4).
When you send a Sound Card or AVR a four channel source, they know that it's a quadrophonic track, and map the Rear Left/Rear Right to the correct output channels (7 & 8).
I'm not sure that there is anything for Media Center to do here, because Media Center is behaving correctly.
When you play a four channel source and tell it to use the "source number of channels", it outputs a four channel signal mapped to channels 1-4.
If you set the output to "5.1 channels" it maps the output to channels 1,2,5,6 and if you set the output to "7.1 channels" it maps them to 1,2,7,8 ensuring that the sound is played to the Rear channels rather than the Center/LFE channels.
(apparently Rear Left/Rear Right move from channels 5 & 6 in 5.1 to 7 & 8 in a 7.1 signal, unless Media Center is doing the wrong thing here)
--- Quote from: Fitzcaraldo215 on February 08, 2018, 11:53:23 am ---Jim - that would be fine by me, and it might help current and future users avoid the Source Number of Channels trap. Unless someone has a lot of 6.0 BDs or other formats - DVD maybe, but I doubt it - it should not cause a major problem.
--- End quote ---
The fact that 6.0 media exists means that it would be a problem if you tried to map all 6 channel sources to a 5.1 output.
Fitzcaraldo215:
--- Quote from: TheShoe on February 07, 2018, 06:14:30 pm ---i have some dsd files that are 4.0 audio and source number of channels does not work for me. i need to set up a zone as 5.1 to hear the surround channels as jriver outputs 2.0 if i use source number of channels.
anything that is 2.0, 5.1, 7.1 work just fine with source number of channels
--- End quote ---
I also have some DSD rips/extracts from SACD with 3 or 4 channel audio. However, they are all in 5.0 containers as DSFs with the appropriate channels null and containing no audio signal. So, 5.1 output works as expected with them, as would Source Number of Channels, being equal to 5 in each case.
dtc:
This issue has come up before. A solution may be to just add the explicit options as an option under Source Number of Channels. For example,
4 Channel - LF/RF/LS/RS (4.0)
or
4 Channel - LF/RF/C/LFE (3.1)
5 Channel - LF/RF/C/LS/RS (5.0)
or
5 Channel - LF/RF/C/LFE/BS (4.1) (BS = Back Surround = LS+RS)
6 Channel - LF/RF/C/LFE/LS/RS (5.1)
or
6 Channel - LF/RF/LS/RS/LR/RR(6.0) (S - Side, R = Rear)
and any other options that can be identified.
It may be just a matter of having a option to include LFE or not when using Source Number of Channels, and have the mappings happen behind the scenes.
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