Bug 87656

any reason not using udev detect  ?



do you mean multi channel profile not work ?

http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/src/modules/alsa?id=48edd0a00f455df075efcf1986103e5f507c816f

http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/src/modules/alsa?id=c15107eaf6045711d799a71204a8f94a1c424182

http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/src/modules/alsa?id=be8311417caedc3c5a539cc06a7549bfdbd167e3

How do I use udev?  I didn't know I had it off.  I just took the existing conf file and edited it to try to make the sound devices correct.

None of the profiles show up in pulseaudio.  I also tried to create a 10-channel profile using a mapping like left,right,aux2,aux3,aux4,aux5,aux6,aux7,aux8,aux9,aux10 but that didn't work.

I am on Ubuntu 14.04 so I don't have the exact-channels option.

Created attachment 111256 [details]
This configuration works better -- the 10 channel device works, but the stereo ones don't

http://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/Developer/PulseAudioFromGit/


Method 3: Running From the Build Tree Without Installing

http://colin.guthr.ie/2010/09/compiling-and-running-pulseaudio-from-git/. It would be good to copy that here.)

heh, that website is out of date, the repo url is now git://anongit.freedesktop.org/pulseaudio/pulseaudio

Once I get the trunk version of PA working, how do I create a profile that says "make a stereo device from these two specific channels from this 10 channel sound device"?

you need to follow up if multi channel profile does not work as expected 


http://lists.freedesktop.org/archives/pulseaudio-discuss/2014-July/020976.html

http://lists.freedesktop.org/archives/pulseaudio-discuss/2014-August/021037.html

Created attachment 111329 [details]
Log of attaching the Traktor A10 to current git head PA

So I tried this config file with the git version and got this log -- The 10 channel device still works fine, but my attempts to make smaller stereo devices fails.

Also I notice that if I use a basic music player with the 10 channel device, it plays stereo out of all the 5 sets of outputs.

Created attachment 111330 [details]
conf file with  exact-channels this time

you have to discuss your expectation in pulseaudio discuss mailing list 


it is unlikely for pulseaudio  to support multiple stereo streams



jackd seem to be more suitable than pulseaudio

Created attachment 111374 [details]
Working config for A10

I would have thought there's be a way to have stereo, 4.0, 4.1, 5.0, 5.1, etc mappings like my regular intel sound card, but maybe that's an issue with the alsa driver itself?

Anyway, here is a version of the config file that works for pulseaudio -- it just creates a 10 channel device in and/or out.

Although I don't own an Audio6, that device came out at the same time as my A10 and I would strongly suspect that it works in a similar way.  Therefore I would suggest that its config file be changed too.

but playing mono  output to left channel only

Native_Instruments_Traktor_Audio_10_71C5613E-00-T10.analog-out-all becomes busy, resuming.
D: [lt-pulseaudio] resampler.c: Resampler:
D: [lt-pulseaudio] resampler.c:   rate 48000 -> 44100 (method speex-float-1)
D: [lt-pulseaudio] resampler.c:   format s16le -> s32le (intermediate float32le)
D: [lt-pulseaudio] resampler.c:   channels 1 -> 10 (resampling 1)
D: [lt-pulseaudio] resampler.c: Channel matrix:
D: [lt-pulseaudio] resampler.c:        I00 
D: [lt-pulseaudio] resampler.c:     +------
D: [lt-pulseaudio] resampler.c: O00 | 1.000
D: [lt-pulseaudio] resampler.c: O01 | 0.000
D: [lt-pulseaudio] resampler.c: O02 | 0.000
D: [lt-pulseaudio] resampler.c: O03 | 0.000
D: [lt-pulseaudio] resampler.c: O04 | 0.000
D: [lt-pulseaudio] resampler.c: O05 | 0.000
D: [lt-pulseaudio] resampler.c: O06 | 0.000
D: [lt-pulseaudio] resampler.c: O07 | 0.000
D: [lt-pulseaudio] resampler.c: O08 | 0.000
D: [lt-pulseaudio] resampler.c: O09 | 0.000

these kind of peak detect is also useless

lt-pulseaudio] resampler.c: Resampler:
D: [lt-pulseaudio] resampler.c:   rate 44100 -> 25 (method peaks)
D: [lt-pulseaudio] resampler.c:   format s32le -> float32le (intermediate float32le)
D: [lt-pulseaudio] resampler.c:   channels 10 -> 1 (resampling 1)
D: [lt-pulseaudio] resampler.c: Channel matrix:
D: [lt-pulseaudio] resampler.c:        I00   I01   I02   I03   I04   I05   I06   I07   I08   I09 
D: [lt-pulseaudio] resampler.c:     +------------------------------------------------------------
D: [lt-pulseaudio] resampler.c: O00 | 0.100 0.100 0.100 0.100 0.100 0.100 0.100 0.100 0.100 0.100

Owen, in the first message you say that previous NI cards used separate stereo subdevices, but the new Audio 10 card uses a single 10-channel device. To me it sounds unlikely that PulseAudio would have a configuration file for Audio 10 that wouldn't have worked when the file was initially written, so probably something changed at some point. Perhaps just the kernel driver changed, or perhaps a new revision of the hardware works differently. In either case, it's problematic if PulseAudio can't distinguish between two different kernel driver versions or between two different hardware revisions, because there will always be some combination that will not work. If it's just a kernel driver change, though, then it's better to support the new version rather than the old one.

According to the "aplay -L" output there are the normal alsa devices like "front" and "surround40" available. Do those work? If you don't know, here's how to test them:

    pasuspender -- speaker-test -Dfront:T10 -c2 -FS32_LE
    pasuspender -- speaker-test -Dsurround40:T10 -c4 -FS32_LE

If those work, then the special profile set file for Audio 10 is not needed at all anymore, unless we really want things like multiple stereo sinks.

You asked how the card can be split to multiple stereo sinks. The answer is that the profile set configuration doesn't support that. It is possible to use module-remap-sink, but that's cumbersome with hotpluggable cards.

(In reply to Owen Williams from comment #0)
> Created attachment 111247 [details]
> My attempt at fixing the configuration file
> 
> Previous Native Instruments sound cards, like the Audio4DJ, used separate
> stereo subdevices, and a .conf file was created to merge these devices
> together in pulseaudio.  However the new Audio 10 card has one device with
> 10 channels, and the existing configuration file doesn't work because it
> references nonexistent subdevices.


http://cgit.freedesktop.org/pulseaudio/pulseaudio/tree/src/modules/alsa/mixer/profile-sets/native-instruments-traktor-audio10.conf

do you want to remove these conf ?

are there any difference between your propose conf and multi channel profile ?

http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/src/modules/alsa/mixer/profile-sets/native-instruments-traktor-audio10.conf?id=5a4176409cbb38cc5910630f77a3701a030361d7

you have to notify the author of this patch if you want to remove/replace  native-instruments-traktor-audio10.conf

I am having trouble testing the front and surround devices with aplay because I always get the error: aplay: set_params:1233: Sample format non available
Available formats:
- S32_LE


And none of those devices show up in pavucontrol, either.

(In reply to Owen Williams from comment #18)
> I am having trouble testing the front and surround devices with aplay
> because I always get the error: aplay: set_params:1233: Sample format non
> available
> Available formats:
> - S32_LE
> 
> 
> And none of those devices show up in pavucontrol, either.

this look like alsa bug/limitation 

you have to define customised front, suuround40, .. for your traktor audio10

need plug:front if your card does not support s16_le


USB-Audio.pcm.front.0 {
	@args [ CARD ]
	@args.CARD {
		type string
	}
	
		type route
		ttable.0.0 1
		ttable.1.1 1
		slave.pcm {
			type hw
			card $CARD
		}
		slave.channels 10

Did you try speaker-test as I suggested? You can give the correct sample format to speaker-test, but aplay has the problem that I don't think it can convert between sample formats, so if you must use aplay, you need to find a file that contains audio in the S32_LE format.

(In reply to Owen Williams from comment #18)
> And none of those devices show up in pavucontrol, either.

Forgot to reply to this part... It's expected that the "front" and "surroundX" devices don't show up in pavucontrol. Those devices refer to the same sound card, the channel configuration is just different. In pavucontrol you will have just one sink, and you can switch between the channel configurations in the "Configuration" tab.

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