Re: [gentoo-user] Usb sound and ALSA

["Leandro Melo de Sales" <leandroal@gmail.com>]

Hi,

 After I click on Apply button the Alsa Device Configuration section
become enabled, but when I specify hw1,0 in Stereo text field and play
a song amarok shows the message: "Audio output unavailable; the device
is busy.".

/proc/asound/ # ls
ASM5X0  Modem  card1  cards    hwdep    oss  seq     version
ICH6    card0  card2  devices  modules  pcm  timers

the file ASM5X0 is a symbolic link to card2.

/proc/asound/ # cat cards
 0 [ICH6           ]: ICH4 - Intel ICH6
                      Intel ICH6 with unknown codec at 0xc8000800, irq 18
 1 [Modem          ]: ICH-MODEM - Intel ICH6 Modem
                      Intel ICH6 Modem at 0x3400, irq 18
 2 [ASM5X0         ]: USB-Audio - AS-M5X0
                      Gradiente AS-M5X0 at usb-0000:00:1d.1-1, full speed

I also tried to specify hw2,0 but the message is the same, device is busy! :(

But a good news is that if I do:

mpg123 -a /dev/sound/dsp1 music.mp3

... the file is played on my usb device perfectly!!! So, this is the
proof that kernel recognize the device and I just don't know how
switch alsa default device do /dev/sound/dsp1.

Any clue? Thank you,

Leandro.

2006/10/31, Leandro Melo de Sales <leandroal@gmail.com>:
> Hi... The device is configured and I type cat xxx > /dev/sound/dsp1
> and I got an strange sound, but this prove that the device was
> recognized by the kernel. I also can control volume of the second
> audio device through alsamixer. The question is: how can I specify (on
> alsa) that the default device is /dev/sound/dsp1 or something like
> that?
>    I tried to do what you said on Amarok, but the "Alsa Device
> Configuration" section is disabled, why?
>
> []s
> Leandro.
>
> 2006/10/31, Richard Fish <bigfish@asmallpond.org>:
> > On 10/30/06, Leandro Melo de Sales <leandroal@gmail.com> wrote:
> > > Hi list...
> > >
> > >    I have an usb sound system from Gradiente company (an eletronic
> > > device factory) and I plugged it on my system. dmesg command shows
> > > this:
> > >
> > >     input: Gradiente AS-M5X0 as /class/input/input3
> > >     input: USB HID v1.00 Device [Gradiente AS-M5X0] on usb-0000:00:1d.1-1
> > >
> > >    But when I play a mp3 media the sound is not forwarded to my usb
> > > device, instand, the sound is still played through my integrated
> > > laptop device.
> > >    On windows I use it without problem. So, what do I have to do to
> > > forward the sound to my usb device?
> >
> > Probably windows is disabling any existing sound card or at least
> > making the USB the "default" sound device.  Unfortunately there is no
> > equivalent with alsa currently.
> >
> > So assuming that you've got the alsa drivers loaded for this device
> > (/proc/asound/cards should contain two entries), you can usually
> > specify alsa device as "hw1,0".  The exact method for doing this
> > depends on what app you are using.  For example on amarok with the
> > xine it is under Configure Amarok... -> Engine -> ALSA Device
> > Configuration.  If you enter hw1,0 for Stereo there, then 2 channel
> > audio should be played on the first pcm of the second sound card.
> >
> > You should also be able to do this with a .asoundrc file, with an entry like:
> >
> > pcm.default {
> >         type hw
> >         card 1
> >         device 1
> > }
> >
> > The above is really primitive, without any dmix plugin (software
> > mixing), so only one app could use the device at a time unless it does
> > hardware mixing.  Mostly this is just to give you an idea of where to
> > look! ;-)
> >
> > -Richard
> > --
> > gentoo-user@gentoo.org mailing list
> >
> >
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