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alocacoc

Member

From: Germany

Registered: 2013-06-27

Posts: 104

[SOLVED] 5.1 Audio Setup Problem

I use Pulseaudio with a 5.1 Headphone.

All channels are correct, except front center, which is played only at the front right side. The front left speaker, which should be used with the front right speaker together to create the center is not used. Tested the headphone under Windows 7 where it is working like it should.

Under KDE Audio Hardware Setup the problem already exists when using the test button.

Any idea how to activate the center properly?

Thanks

Last edited by alocacoc (2014-06-01 12:42:18)

emeres

Member

Registered: 2013-10-08

Posts: 1,570

Re: [SOLVED] 5.1 Audio Setup Problem

How do you connect your headphones? Using jacks or usb, so more or less a headset? Do you get expected behaviour using speaker-test with pulseaudio suspended/killed?

speaker-test -c 6 -t wav -D plughw:your_output_device_for_surround

You can drop the -D switch to run it through default sound card.

alocacoc

Member

From: Germany

Registered: 2013-06-27

Posts: 104

Re: [SOLVED] 5.1 Audio Setup Problem

The command you gave me produces the same problem.

The headset is connected through a USB, the soundcard is build in the headphone.

I am now using a workaround, setting the soundcard to 4.1 instead of 5.1, then the center is routed to front left + front right. Its not a real solution though.

Thank you.

emeres

Member

Registered: 2013-10-08

Posts: 1,570

Re: [SOLVED] 5.1 Audio Setup Problem

Use plug plugin (or route) with ttable to map channels right with speaker-test playing 5.1. For correct mapping (according to your information) check:

less /usr/share/alsa/pcm/surround41.conf

alocacoc

Member

From: Germany

Registered: 2013-06-27

Posts: 104

Re: [SOLVED] 5.1 Audio Setup Problem

Looks complicated, I'll test it when I got time.

Thank you.

emeres

Member

Registered: 2013-10-08

Posts: 1,570

Re: [SOLVED] 5.1 Audio Setup Problem

Using ttable part of surround41 should be sufficient, if using that device produces excepted behaviour. Look up the rest of the plugin configuration that is needed in the documentation I mentioned.

	ttable.0.0 1
	ttable.1.1 1
	ttable.2.2 1
	ttable.3.3 1
	ttable.4.5 1

Toss the channels around until you get the correct behaviour.

brebs

Member

Registered: 2007-04-03

Posts: 3,742

Re: [SOLVED] 5.1 Audio Setup Problem

The front left speaker, which should be used with the front right speaker together to create the center is not used

Do you physically *have* a front-centre speaker, or not?

If not, then 4.1 is what you have. Why do you think surround41 is inappropriate?

alocacoc

Member

From: Germany

Registered: 2013-06-27

Posts: 104

Re: [SOLVED] 5.1 Audio Setup Problem

Yes, guessable there is no physical speaker for center in the headset.

So 4.1 is the correct setting.

Thank you very much.