Vero 4K, 2017.06-1, currently running the 10bit test kernel, but I have also tested without it and have gotten the same result (logs)
Multichannel audio files are incorrectly being mapped to 5.1 PCM output. I have a 5.1-capable receiver and first noticed this when listening to some 5.1 FLAC that should’ve been using the rears but wasn’t. I downloaded some test files and noticed that the surround L&R were being mapped to front L&R and LFE was being dropped. I tried all possible options for System > Audio > Output Configuration (Fixed/Optimized/Best match). Audio device is AML-M8AUDIO, HDMI and Number of Channels is 5.1. I have tried playing the same files with Kodi 17.3 on my Mac using HDMI output to my receiver (5.1 PCM as well), and all map channels correctly. I have tried disabling System > Audio > Allow passthrough and the DTS file below is mapped incorrectly, but of course the mapping is correct if I allow the pure DTS to be passed thru & decoded by my receiver (Marantz SR7010).
5.1 channel test files (all will announce which channel they should be playing from):
They are debug logs… NOTICE: Enabled debug logging due to GUI setting. Level 2.
Yes, it only occurs when the audio is converted to PCM because it has to be (FLAC) or because pass-thru is disabled (DTS). I can try 5.1 channel AAC as well but I imagine it’ll have the same issue as FLAC.
Thanks. I would consider this a bug of the highest-priority since my primary use for my Vero is playing Multichannel FLAC. The 10-bit stuff is more just for future-proofing - very little content available there yet.
As far as I’m aware, there isn’t a July update so I assume you mean the June update. Also, AC3 transcoding is not a solution - converting from a lossless to lossy format defeats the purpose.
UPDATE: I looked and the downgrading process seems painful, requiring wiping the device and installing from an image. I’d like to avoid going through that hassle. Honestly this box is already enough of a hassle.
There were audio changes in the June update and the issue is no doubt related to those changes. I suspect the May update is not afflicted with this
Unless you have a lot of software packages installed; a backup and restore from My OSMC will do the trick and takes five minutes.
Very sorry to hear that. I’ve PMed you to ask what we can do to make things better. Currently Vero 4K is considered to be one of the best devices on the market with good response times to issues. You may find another solution that meets your needs; but we always pride ourselves on resolving issues promptly (past and future). I suspect you will struggle to find that elsewhere, coupled with the feature set the Vero 4K offers.
Ok, I can confirm that the backup/reinstall/restore process was pretty straightforward. Thanks for linking me to the docs which I probably should’ve been able to find on my own
I can confirm that reverting to 2017.05-2 resolves the channel mapping issue, however there is some slight crackling with all of the test files when the rear channels play. I had never explicitly tested the rear channels before discovering this issue recently, but had noticed it on & off again when playing back videos with 5.1 AAC tracks - not reproducible enough to be a reportable issue, but worth noting nonetheless.
As I was involved in testing the audio improvements, I’m also guilty… My primary focus was on 192kHz to work properly and with that I only looked for my AVR to show and play 192kHz content. But not expecting this issue, I didn’t listen longer and therefore didn’t notice that three (C, LB, RB) of my speakers were staying silent.
I can confirm now after another test that 5.1 FLAC files are only played via the front speakers as stereo.
It’s not my main use of the Vero 4k, so not a big deal for me, but it would be nice to have this fixed obviously!