https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1198577

seem support 10 channels playback and 6 channels capture

post output of

speaker-test -c2 -d -t wav -Dplughw:1

http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/src/modules/alsa/mixer/profile-sets/default.conf?id=7bb8442c111d5e1fba20eb101eb854edd5392627

6 channels capture can be added similar to 4 channels capture

Thanks for the verbose log. Unfortunately, it still does not contain all the information that is needed to debug this. Your message indicates that aplay can produce sound. Could you please paste the output of the following command?

aplay -vv -D plughw:CARD=FCA610,DEV=0 Musik/test-6ch.wav

If that fails:

aplay -vv -D plughw:CARD=FCA610,DEV=0 -c 10 Musik/test-6ch.wav

Also, there was a very similar discussion in January this year. Please read it, maybe it contains some ideas applicable to your case:

http://lists.freedesktop.org/archives/pulseaudio-discuss/2014-January/019685.html

http://www.behringer.com/EN/Products/FCA610.aspx

Streams 6 inputs / 10 outputs plus 1x MIDI I/O with ultra-low latency to your computer, supporting Mac* OS X* and Windows XP* or higher
Ultra-flexible connectivity via analog and S/PDIF I/O ports (coaxial and optical)

Wow, thank you very much Alexander. I followed David's suggestion for a workaround (http://lists.freedesktop.org/archives/pulseaudio-discuss/2014-January/019748.html) to create the multichannel.conf profile and added the following to /lib/udev/rules.d/90-pulseaudio.rules:

# Behringer FCA610
ATTRS{idVendor}=="1397", ATTRS{idProduct}=="0003", ENV{PULSE_PROFILE_SET}="multichannel.conf"

I can use the device for the first time! :) I haven't read the entire thread yet, but it's very late and I need to get some sleep. Getting 6ch/5.1 playback functionality (and probably stereo input) is what I wanted from PulseAudio. (If really want to make use of all channels I'd look into JACK.) I will come back once I looked deeper into this.

you need jackd for stereo capture since pulseaudio downmix 6 channels capture to stereo

Hi, I recently committed a multichannel patch to Git head that I hope should fix this issue. Please test it, and if it does not work, feel free to reopen this bug. Thanks!

commit 48edd0a00f455df075efcf1986103e5f507c816f
Author: David Henningsson <david.henningsson@canonical.com>
Date:   Fri Jul 25 15:16:41 2014 +0200

    alsa: Add a multichannel fallback mapping

Hello David, would it be possible to provide the patch in the PulseAudio testing PPA (https://launchpad.net/~ubuntu-audio-dev/+archive/ubuntu/pulse-testing)?

Created attachment 114128 [details]
Pulseaudio 6.0 -vvvvv output on Ubuntu 15.04

Sorry for replying so late. I noticed that 6.0 was uploaded to Ubuntu 15.04 recently. On my clean testing system 6 inputs are now available in sound settings and pavucontrol, but outputs are still not discovered.

I think I see what the bug is in the latest log - the "multichannel" mapping seems to be shared between input and output mappings:

 1) Detect that output supports only 10 channels
 2) Change mapping "multichannel" to 10 channels
 3) Detect that input supports only 6 channels
 4) Change mapping "multichannel" to 6 channels
 5) Try to open output on mapping "multichannel" with 6 channels, and fail.

this mean you need two profiles, one for output and one for input in 

http://cgit.freedesktop.org/pulseaudio/pulseaudio/tree/src/modules/alsa/mixer/profile-sets/default.conf

+[Mapping multichannel-output]
+device-strings = hw:%f
+channel-map = left,right,rear-left,rear-right
+exact-channels = false
+fallback = yes
+priority = 1
+direction = output

+[Mapping multichannel-input]
+device-strings = hw:%f
+channel-map = left,right,rear-left,rear-right
+exact-channels = false
+fallback = yes
+priority = 1
+direction = input



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



static const struct description_map well_known_descriptions[] = {
         { "analog-mono",            N_("Analog Mono") },
         { "analog-stereo",          N_("Analog Stereo") },
-        { "multichannel",           N_("Multichannel") },
+        { "multichannel-output",           N_("Multichannel Output") },
+        { "multichannel-input",           N_("Multichannel Input") },
         { "analog-surround-21",     N_("Analog Surround 2.1") },
         { "analog-surround-30",     N_("Analog Surround 3.0") },
         { "analog-surround-31",     N_("Analog Surround 3.1") },

Hi,

I've posted a patch set here: http://lists.freedesktop.org/archives/pulseaudio-discuss/2015-March/023561.html

The second of the three is a patch as suggested by Raymond and should fix this issue, but the third makes sense to test in combination with the second.

If you have time, please test and let me know if it fixes the issue. Thanks!

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