[gentoo-laptop] Problems when more than one application uses sound

[gentoo-laptop] Problems when more than one application uses sound

[Felipe Ribeiro]

Hi,

I'm using alsa, and i can't use the sound simultaneously by more than
one application, for example, when i'm seeing flash animations on
firefox, xmms can't output sound. How can i solve this?

Cheers,
Felipe

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Re: [gentoo-laptop] Problems when more than one application uses sound

[Jan Hübner]

Felipe Ribeiro wrote:
> Hi,
>
> I'm using alsa, and i can't use the sound simultaneously by more than
> one application, for example, when i'm seeing flash animations on
> firefox, xmms can't output sound. How can i solve this?
>
> Cheers,
> Felipe
>
Maybe use 'arts' if you are using KDE or try to find out what 'esd' is
when you are using gnome. I don't know if and how both can be used when
you are not using one of those desktop environments..

HTH

Jan
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Re: [gentoo-laptop] Problems when more than one application uses sound

[Matthias Bethke]

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Hi Jan,
on Sunday, 2006-05-28 at 19:03:22, you wrote:
> Maybe use 'arts' if you are using KDE or try to find out what 'esd' is
> when you are using gnome. I don't know if and how both can be used when
> you are not using one of those desktop environments..

AFAIK, both can. However, with one of the most frequent Alan Cox quotes
being that his "views on ESD are mostly unprintable", this doesn't sound
like a good idea :) Don't ask me why, I haven't used it, but I guess it
because of stuff like latencies and probably some CORBA mess.
I'd like to add JACK to the list, it's written especially for ALSA and
low-latency apps like music-production software. Also
desktop-independent.

cheers!
	Matthias
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Re: [gentoo-laptop] Problems when more than one application uses sound

[Marcus Priesch]

Hi,

ALSA sould be capable of this - for me it just works with recent drivers
(2.6.12++) - also remember that you can uses alsa's ~/.asoundrc to
define software mixers and virtual soundcards - there is an example for
a SW mixer on the alsa home page - try looking for the .asoundrc
documentation ... 

note that i managed to create 4 virtual mono (stereo mixed together)
soundcards using one terratec 5.1 pci card with a special hand
crafted .asoundrc (in my case it was /etc/asoundrc, as it was for the
complete system)

just my2c & good luck,
mexx.


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Re: [gentoo-laptop] Problems when more than one application uses sound

[Erick M]

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hi Marcus,

would you mind showing us the content of your /etc/asoundrc?
I am quite interested by the subject.

Thanks for your time and comprehension

Best Regards,

Erick

On 6/1/06, Marcus Priesch <marcus@priesch.priv.at> wrote:
>
> Hi,
>
> ALSA sould be capable of this - for me it just works with recent drivers
> (2.6.12++) - also remember that you can uses alsa's ~/.asoundrc to
> define software mixers and virtual soundcards - there is an example for
> a SW mixer on the alsa home page - try looking for the .asoundrc
> documentation ...
>
> note that i managed to create 4 virtual mono (stereo mixed together)
> soundcards using one terratec 5.1 pci card with a special hand
> crafted .asoundrc (in my case it was /etc/asoundrc, as it was for the
> complete system)
>
> just my2c & good luck,
> mexx.
>
>
> --
> gentoo-laptop@gentoo.org mailing list
>
>

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Re: [gentoo-laptop] Problems when more than one application uses sound

[Marcus Priesch]

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hi Erick,

here you are!

c1 to c4 are the four independent channels, the soundcard has two
subdevices (0 and 0,1 for the "front" and "rear" output) ...

greets & have fun hacking alsa ;)
mexx.

On Thu, 2006-06-01 at 15:41 +0200, Erick M wrote:
> hi Marcus,
> 
> would you mind showing us the content of your /etc/asoundrc?
> I am quite interested by the subject.
> 
> Thanks for your time and comprehension
> 
> Best Regards,
> 
> Erick
> 
> On 6/1/06, Marcus Priesch <marcus@priesch.priv.at> wrote:
>         Hi,
>         
>         ALSA sould be capable of this - for me it just works with
>         recent drivers
>         (2.6.12++) - also remember that you can uses alsa's
>         ~/.asoundrc to
>         define software mixers and virtual soundcards - there is an
>         example for 
>         a SW mixer on the alsa home page - try looking for
>         the .asoundrc
>         documentation ...
>         
>         note that i managed to create 4 virtual mono (stereo mixed
>         together)
>         soundcards using one terratec 5.1 pci card with a special
>         hand 
>         crafted .asoundrc (in my case it was /etc/asoundrc, as it was
>         for the
>         complete system)
>         
>         just my2c & good luck,
>         mexx.
>         
>         
>         --
>         gentoo-laptop@gentoo.org mailing list
>         
> 

[-- Attachment #2: asound.conf --]
[-- Type: text/plain, Size: 1048 bytes --]

pcm.dmix1 {
    type dmix
    ipc_key 12
    ipc_key_add_uid false
    ipc_perm 0666
    slave {
        pcm "hw:0"
        rate 44100
        period_time 0
        period_size 1024
        buffer_size 8192
        channels 2
    }
    bindings {
        0 0
        1 1
    }
}

pcm.dmix2 {
    type dmix
    ipc_key 1234
    ipc_key_add_uid false
    ipc_perm 0666
    slave {
        pcm "hw:0,1"
        rate 44100
        period_time 0
        period_size 1024
        buffer_size 8192
        channels 2
    }
    bindings {
        0 0
        1 1
    }
}

pcm.c1 {
    type plug
    slave {
        pcm "dmix1"
        channels 2
    }
    ttable.0.0 0.5
    ttable.1.0 0.5
}

pcm.c2 {
    type plug
    slave {
        pcm "dmix1"
        channels 2
    }
    ttable.0.1 0.5
    ttable.1.1 0.5
}

pcm.c3 {
    type plug
    slave {
        pcm "dmix2"
        channels 2
    }
    ttable.0.0 0.5
    ttable.1.0 0.5
}

pcm.c4 {
    type plug
    slave {
        pcm "dmix2"
        channels 2
    }
    ttable.0.1 0.5
    ttable.1.1 0.5
}