Arch Linux

PiroXiline

Member

Registered: 2013-08-06

Posts: 4

Firefox does'n play HTML5 audio on default ALSA device

Firefox want to work only with pulseaudio. Can someone help with information how to force Firefox to use default alsa device or device named “dmixed” so there is no need to start pulseaudio?

Environmental variables ALSA_CARD, ALSA_PCM_CARD not seems to work, or maybe I don't figure out proper form of device names to set.

My !default ALSA device config:

pcm.!default {
    type plug
    slave.pcm "dmixed"
}

pcm.dmixed {
    type asym
    playback.pcm {
        type dmix

        ipc_key_add_uid true
        ipc_key 5678293
        ipc_perm 0660
        ipc_gid audio

        slave {
            channels 6
            pcm {
                format S32_LE
                rate 88200

                nonblock true

                type hw
                card 0
                device 0
                subdevice 0
            }

            period_size 1024
            buffer_size 8192
        }
    }
    capture.pcm "dsnoop"
}

I use ~/.asoundrc from ALSA configuration kindly posted by brebs on this forum, because it suited my needs.

P.S.
All this configuration was to get possibility to use sound card directly, because Pulse always authoritatively grabs card and not closing itself despite configuration to terminate immediately.

Environmental variable FLASH_ALSA_DEVICE="plug:dmix" helped to forse audio device for Flash, but I wonder why only “plug:dmix” work and “plug:dmixed” not.

I'am writing this topic because I desperately searched for solution & wanted to solve problem and post solution to Arch Wiki Troubleshooting sections.

Last edited by PiroXiline (2014-12-20 05:27:34)

mir91

Banned

Registered: 2013-11-17

Posts: 143

Re: Firefox does'n play HTML5 audio on default ALSA device

No sound from html5-Videos in Firefox either here.
Works fine with other apps like vlc, mplayer, audacious. Simultaenously too.

pcm.!default {
  type asym
  playback.pcm "LoopAndReal"
  #capture.pcm "looprec"
  capture.pcm "hw:0,0"
}

pcm.looprec {
    type hw
    card "Loopback"
    device 1
    subdevice 0
}


pcm.LoopAndReal {
  type plug
  slave.pcm mdev
  route_policy "duplicate"
}


pcm.mdev {
  type multi
  slaves.a.pcm pcm.MixReale
  slaves.a.channels 2
  slaves.b.pcm pcm.MixLoopback
  slaves.b.channels 2
  bindings.0.slave a
  bindings.0.channel 0
  bindings.1.slave a
  bindings.1.channel 1
  bindings.2.slave b
  bindings.2.channel 0
  bindings.3.slave b
  bindings.3.channel 1
}


pcm.MixReale {
  type dmix
  ipc_key 1024
  slave {
    pcm "hw:0,0"

    rate 48000
    periods 128
    period_time 0
    period_size 1024
    buffer_size 8192
  }
}

pcm.MixLoopback {
  type dmix
  ipc_key 1025
  slave {
    pcm "hw:Loopback,0,0"
    rate 48000
    periods 128
    period_time 0
    period_size 1024
    buffer_size 8192
  }
}

Last edited by mir91 (2015-02-17 21:59:27)