Hello, @noris. Thanks for the quick response. First, I’ve uploaded five files for you to the site you PM’d me, to wit:
04. Just You ‘N’ Me.flac
The first file is the standard 5.0 /5.1 set of filters that work fine across anything stereo or multichannel, DSF to 22/44.1, other than 4.0 content.
The third file is the crosstalk correction set of filters which, again, works for 5.0/5.1 across all content, other than 4.0 content.
The second and fifth files are the test filters that Thierry created to attempt mapping out the 4.0 content, without success.
The fourth file is a sample cut from Chicago IX Quadro, in 4.0 multichannel format 24/48 resolution.
Roon core is on an i7 server built by Small Green Computer (a CAPSZuma design). It is running Windows Server 2016 in desktop experience mode, as modified by Audiophile Optimizer with Roon server (a blank black screen) as the default login screen. DAC is a stack of three Musical Fidelity V-90 DACs arrayed together as a single DAC via miniDSP’s UDIO-8 box.
To show you signal path, here first is the standard config_HAF.zip set of filters playing a 5.1 file:
In Roon setup, this is setup as DSD convert to PCM, NO MQA support, max rates 24/192, MQA core decoder enabled, channel layout 7.1 with no swapping of rear and surround channels and channel mapping only. My system is 5.2, so 7.1 without swapping rear channels seems off, but that is the way that Thierry set it up and it works fine.
Switching to the no mapping filter, with no changes in the setup, the signal path looks like this:
The signal path looks the same if I switch to swapping rear and surround channels. If I switch to 5.1 in setup, the signal path is the same except that the channel mapping 5.1 to 7.1 line disappears.
Switching to the quad test filter, and set up as 7.1 with no swapping of channels and channel mapping in place, it looks like this for the signal path:
It looks the same on the signal path when selecting the swapping of rear and surround channels. When switching to 5.1, it looks like this:
Switching now to the Chicago file that I’ve sent you, here’s how it looks in the signal path with the standard filters, as 7.1, 7.1 with swap and 5.1. Note that in the standard filter format, Roon doesn’t even see the file as a 4.0 file. Weird, as you see that with 7.1 swap and 5.1, each as set out below.
I won’t go through the two test filters, no mapping and quad44, but you get the idea and if you do need me to run those and show the three different path choices for each (7.1, 7.1 with swap and 5.1), then let me know.
Thanks for the help. JCR