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stonerl

Member

Registered: 2007-05-28

Posts: 17

[solved] 2 sounddevices - no sound in flash or no microphone

I have installed an USB-Soundcard and an USB-Webcam. The problem is, if the webcam is pluged in. The system recognize the soundcard as second device.

**** List of CAPTURE Hardware Devices ****
card 0: Camera [Camera], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: Device [Kenwood  Audio Device], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

So,if i try to watch for example videos on YouTube i don´t have sound, an this error-message in the terminal:

ALSA lib pcm_dmix.c:864:(snd_pcm_dmix_open) unable to open slave

If i start the system without the camera plugged-in i have sound. So i created an "/etc/asound.conf" as explained in the wiki, and modified it.

#/etc/asound.conf start:
pcm.!default {
    type plug
    slave.pcm "dmixer"
}
pcm.dsp0 {
    type plug
    slave.pcm "dmixer"
}
pcm.dmixer {
    type dmix
    ipc_key 1024
    slave {
        pcm "hw:1,0"
        period_time 0
        period_size 1024
        buffer_size 8192
        rate 44100
    }
    bindings {
        0 0
        1 1
    }
}

ctl.dmixer {
    type hw
    card 1
}

#end.

After doing this i had sound. But the microphone doesn´t work anymore, and i get the following error-message.

ALSA lib pcm_dmix.c:803:(snd_pcm_dmix_open) The dmix plugin supports only playback stream

Does anyone has an idea how to fix this? Maybe its possible to set the the second card as standart-output or to change the order: Soundcard = Card 0 /  Webcam = Card1.

Last edited by stonerl (2007-05-30 06:51:40)

qlus

Member

From: Tychy, Poland

Registered: 2006-06-15

Posts: 74

Re: [solved] 2 sounddevices - no sound in flash or no microphone

To set the order of my two soundcards I've added to modprobe.conf those lines:

alias snd-card-0 snd-emu10k1
alias sound-slot-0 snd-emu10k1

alias snd-card-1 snd-intel8x0
alias sound-slot-1 snd-intel8x0

options snd-emu10k1 index=0
options snd-intel8x0 index=1

stonerl

Member

Registered: 2007-05-28

Posts: 17

Re: [solved] 2 sounddevices - no sound in flash or no microphone

Great, that worked. I had to modify it, because both cards are using the same driver.

alias snd-card-0 snd-usb-audio
alias sound-slot-0 snd-usb-audio

alias snd-card-1 snd-usb-audio
alias sound-slot-1 snd-usb-audio

options snd-usb-audio index=1,0