v17 -  dsf files: Loud transient noise between 5.1 tracks
#1
Hello,

I am a Kodi newbie and have a problem playing dsf multichannel files.

A single file is played back without any problems.
(Kodi 17 / Libreelec / RPi)
When playing several files in a row, however, there is a loud, unpleasant noise between the titles.
Could be harmful to the speakers in a long run.
2 channel titles are not affected.
A friend's Oppo (BD103?) plays everything without any problems.

The following variants were tested:

dsf 5.1 (dst) >> Transient
dsf 5.1 (dsd) >> Transient
dsf 2.0 (dst) >> OK
dsf 2.0 (dsd) >> OK

To avoid an error in the files, each title was generated in two different ways without changing behavior.

At first, i wanted to create an issue on Github.
That doesn't seem possible for Kodi.

However, I found an interesting post in another project:
https://github.com/sacd-ripper/sacd-ripper/issues/88

"It appears some players cannot handle zero padding at the tail of a DSF correctly. 
I have implemented an option to avoid zero padding while maintaining gap-less data and created a pull request.  "


So i searched for some infos regarding dsf zero padding:
http://dsd-guide.com/sites/default/files...Spec_E.pdf

it says:
[Annotation3] 
Block size per channel is fixed, so please fill ZERO(0x00) for unused sample data area in the block

So zero padding is standard for dsf files and avoid it would'nt be the right way.
If this is the root cause for the transient noise between the tracks, i would be very happy if the bug could be fixed (-;


Btw.
found no threads by searching with keywords like "dsf transient noise" / "dsf noise"
So  i don't know if this is the right place to open an issue.
If not, please point me into the right direction.



regards

Udo
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#2
Raisng the problem here is fine (Github issues would soon get overwhelming given the size of Kodi usersbase, so disabled).

There have been many player fixes and improvements in v18, so it would be useful if you could try a Millhouse build (noting the RPi/LE) of the current nighty, and see if the problem is solved. See forum https://forum.kodi.tv/showthread.php?tid=298461
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#3
Hi,

downloaded the 701 built two days ago but unfortunately no time for backup the actual installation and test a new one.
hope i can check it on friday
i'll report back as soon as possible.

Thanks for the quick reply
and regards

Udo
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#4
OK, tried Leia:
"outch"

the playback of 5.1 dsf files seems to be completely screwed up.
(stuttering, echoes, very low volume)

So i've to find some time to restore the old system.

Just before i did the upgrade i found some free official 5.1 dsf downloads which showed the same problem.
So i'm pretty shure it's a bug

The kodi trac systems seems to be the right place to open a ticket.
https://trac.kodi.tv/ticket/17949#no4
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#5
(2018-07-05, 19:18)strgaltdel Wrote: OK, tried Leia: "outch"
the playback of 5.1 dsf files seems to be completely screwed up.
(stuttering, echoes, very low volume)
The player devs are going to need a lot more to go on than that.
(2018-07-05, 19:18)strgaltdel Wrote: The kodi trac systems seems to be the right place to open a ticket.
https://trac.kodi.tv/ticket/17949#no4
OK, thanks for ticket. The only problem is I don't know who on the team active at the moment, if anyone, is interested in dsf file playback. I'm the music library guy, but know nothing about player mysteries and can't be of any help. I will see if I can identify someone to look at it otherwise the ticket could just sit there. Providing  log files and example music file will help, but the team is short on experts with spare time so please be patient.
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#6
Support for SACD and related formats in KODI is experimental at best. Please use this thread to follow up and help https://forum.kodi.tv/showthread.php?tid=106329
There's very few developers involved and opening a trac ticket will not help at this point. Maybe if enough requests are voiced, it would gain momentum. Don't hold your hopes up though, it's still a "minority" format, even though I know there's kind of a cult following - but those are still very few people compared to mainstream formats.
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#7
(2018-07-07, 18:15)HeresJohnny Wrote: There's very few developers involved and opening a trac ticket will not help at this point. Maybe if enough requests are voiced, it would gain momentum.
Honestly it doesn't make any difference how many people ask for something, or how enthusiasticaly they ask. What is needed is someone with the necessary skills to give their time completely freely to the community. How you find them in the world I don't know.
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#8
True. And I cringe every time somebody asks for something and when asked for something small in return, like some tests, they reply "but I have so little time and have to prioritize". The definition of goodwill is probably "Something you wish you had time for but secretly hope other people will finish for you." Sad Smiley.

Btw: I'm totally psyched by PR 14160!
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#9
@DaveBlake

thanks for your explanations,
and, hey, it's openSource, and i'm aware that kind of media type is all but not mainstream.
So i'd never expect a short-term solution.
It would be great if you could find a developer who is motivated in debug the hires functionality.
(unfortunately for me, mch dsf playback, even with hires pcm conversion, is something like a k.o. criteria for choosing the right media player)
Kodi is a stunning product !

@HeresJohnny
Wasn't aware of your thread, so i'll have to read a little bit, thanks that you drew my attention to this.
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