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Thread: audio popping noise

  1. #1
    Join Date
    Feb 2009
    Location
    Santa Clara, Utah
    Beans
    142
    Distro
    Ubuntu 9.10 Karmic Koala

    audio popping noise

    I have an HP Pavilion and any time there is some audio it makes a loud popping noise before the audio starts. It's really annoying. any ideas?

    I have an nVidia Corporation MCP67 High Definition Audio (Rev a1) card

  2. #2
    Join Date
    Jun 2005
    Beans
    108
    Distro
    Ubuntu 9.04 Jaunty Jackalope

    Re: audio popping noise

    Even though it is reporting as "nVidia Corporation MCP67 High Definition Audio" I suspect it is actually using the "snd-hda-intel" kernel module. Hence you might find some of the following useful:
    http://ubuntuforums.org/showthread.php?t=1307340
    https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/456022
    https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/444385

  3. #3
    Join Date
    May 2009
    Beans
    76
    Distro
    Ubuntu 9.10 Karmic Koala

    Re: audio popping noise

    Yes. Karmic has a powersaving feature that can cause audible pops when your soundcard sleeps and wakes up, if you have an Intel HDA based audio device. The easiest way to test is to play some sound and then close all sound-making applications. Wait, and in 10 to 20 seconds, and your sound card should pop.

    If that happens, you can test further by 1) checking that you have an HDA, and 2) disabling that feature:

    Note to people searching the forum: Karmic only. Jaunty and earlier do not have this feature. So, if you're hearing clicks in Jaunty, you have a different problem from what I'm talking about here.


    Open up a terminal. Applications -> Accessories -> Terminal. Paste (Ctrl+Shift+P is paste in Terminal) this command in and press enter.

    Code:
    cat /proc/asound/cards
    It should mention "HDA Intel" For example, mine says:
    Code:
     0 [Intel          ]: HDA-Intel - HDA Intel
                          HDA Intel at 0xb0000000 irq 22
    If you have an HDA Intel, this one will let you change the configuration:
    Code:
    gksu gedit /etc/modprobe.d/alsa-base.conf
    Enter your password.

    Find the line that starts with
    Code:
    options snd-hda-intel power_save
    and type a # at the beginning of that line to disable it. Save the file, log out, log back in. Now, try playing a sound, closing all sound-making applications and see if the pop has gone away.

  4. #4
    Join Date
    Feb 2009
    Location
    Santa Clara, Utah
    Beans
    142
    Distro
    Ubuntu 9.10 Karmic Koala

    Re: audio popping noise

    Quote Originally Posted by wildweathel View Post
    Yes. Karmic has a powersaving feature that can cause audible pops when your soundcard sleeps and wakes up, if you have an Intel HDA based audio device. The easiest way to test is to play some sound and then close all sound-making applications. Wait, and in 10 to 20 seconds, and your sound card should pop.

    If that happens, you can test further by 1) checking that you have an HDA, and 2) disabling that feature:

    Note to people searching the forum: Karmic only. Jaunty and earlier do not have this feature. So, if you're hearing clicks in Jaunty, you have a different problem from what I'm talking about here.


    Open up a terminal. Applications -> Accessories -> Terminal. Paste (Ctrl+Shift+P is paste in Terminal) this command in and press enter.

    Code:
    cat /proc/asound/cards
    It should mention "HDA Intel" For example, mine says:
    Code:
     0 [Intel          ]: HDA-Intel - HDA Intel
                          HDA Intel at 0xb0000000 irq 22
    If you have an HDA Intel, this one will let you change the configuration:
    Code:
    gksu gedit /etc/modprobe.d/alsa-base.conf
    Enter your password.

    Find the line that starts with
    Code:
    options snd-hda-intel power_save
    and type a # at the beginning of that line to disable it. Save the file, log out, log back in. Now, try playing a sound, closing all sound-making applications and see if the pop has gone away.
    it didn't exactly say that but close to it and it was already disabled.

    this is driving me crazy. every 10 seconds even if I mute it

    edit: doesn't make popping sound when listening to music
    Last edited by dbyjazz; November 3rd, 2009 at 09:49 PM.

  5. #5
    Join Date
    Sep 2008
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    Edinburgh, UK
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    738

    Re: audio popping noise

    This thread might be of interest to you:
    http://ubuntuforums.org/showthread.php?t=789578

  6. #6
    Join Date
    Feb 2009
    Location
    Santa Clara, Utah
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    142
    Distro
    Ubuntu 9.10 Karmic Koala

    Re: audio popping noise

    It was already written like this

    Code:
    # autoloader aliases
    install sound-slot-0 /sbin/modprobe snd-card-0
    install sound-slot-1 /sbin/modprobe snd-card-1
    install sound-slot-2 /sbin/modprobe snd-card-2
    install sound-slot-3 /sbin/modprobe snd-card-3
    install sound-slot-4 /sbin/modprobe snd-card-4
    install sound-slot-5 /sbin/modprobe snd-card-5
    install sound-slot-6 /sbin/modprobe snd-card-6
    install sound-slot-7 /sbin/modprobe snd-card-7
    
    # Cause optional modules to be loaded above generic modules
    install snd /sbin/modprobe --ignore-install snd $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-ioctl32 ; /sbin/modprobe --quiet --use-blacklist snd-seq ; }
    #
    # Workaround at bug #499695 (reverted in Ubuntu see LP #319505)
    install snd-pcm /sbin/modprobe --ignore-install snd-pcm $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-pcm-oss ; : ; }
    install snd-mixer /sbin/modprobe --ignore-install snd-mixer $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-mixer-oss ; : ; }
    install snd-seq /sbin/modprobe --ignore-install snd-seq $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq-midi ; /sbin/modprobe --quiet --use-blacklist snd-seq-oss ; : ; }
    #
    install snd-rawmidi /sbin/modprobe --ignore-install snd-rawmidi $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq-midi ; : ; }
    # Cause optional modules to be loaded above sound card driver modules
    install snd-emu10k1 /sbin/modprobe --ignore-install snd-emu10k1 $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-emu10k1-synth ; }
    install snd-via82xx /sbin/modprobe --ignore-install snd-via82xx $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq ; }
    
    # Load saa7134-alsa instead of saa7134 (which gets dragged in by it anyway)
    install saa7134 /sbin/modprobe --ignore-install saa7134 $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist saa7134-alsa ; : ; }
    # Prevent abnormal drivers from grabbing index 0
    options bt87x index=-2
    options cx88_alsa index=-2
    options saa7134-alsa index=-2
    options snd-atiixp-modem index=-2
    options snd-intel8x0m index=-2
    options snd-via82xx-modem index=-2
    options snd-usb-audio index=-2
    options snd-usb-us122l index=-2
    options snd-usb-usx2y index=-2
    options snd-usb-caiaq index=-2
    # Ubuntu #62691, enable MPU for snd-cmipci
    options snd-cmipci mpu_port=0x330 fm_port=0x388
    # Keep snd-pcsp from being loaded as first soundcard
    options snd-pcsp index=-2
    # Power down HDA controllers after 10 idle seconds
    options snd-hda-intel power_save=10 power_save_controller=N
    Last edited by dbyjazz; November 3rd, 2009 at 10:00 PM.

  7. #7
    Join Date
    Feb 2009
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    Santa Clara, Utah
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    142
    Distro
    Ubuntu 9.10 Karmic Koala

    Re: audio popping noise

    oh nevermind! I didn't see the very last line. I put a # in front of it and it's now working.

  8. #8
    Join Date
    May 2009
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    76
    Distro
    Ubuntu 9.10 Karmic Koala

    Re: audio popping noise

    Okay, good. We're not quite done yet, though. I want to make sure that this problem is reported to the developers if your particular audio device hasn't been reported already. Can you post the contents of the "codec" file or files in /proc/asound/card0 ? Also, if you don't have a Launchpad account, could you register for one?

    You don't have to do this, but it would help fix this problem in later Ubuntu releases without requiring users to change that configuration file. You might even get working powersaving without pops. (I haven't seen the fix yet, so I can't be sure...)

  9. #9
    Join Date
    Jul 2005
    Beans
    6

    Re: audio popping noise

    just a note that after modifying /etc/modprobe.d/alsa-base.conf you can force the sound modules to reload without having to reboot by using the following command:

    Code:
    sudo alsa force-reload

  10. #10
    Join Date
    Mar 2006
    Beans
    3
    Distro
    Ubuntu

    Re: audio popping noise

    Thank you wildweathel. I had the same problem and your solution worked great. I have a Realtek ALC883 Azalia 8 Channel onboard soundcard on an Asus P5K-VM motherboard. Also, I'm using Ubuntu 9.10 upgraded from a 9.04 which worked fine. I'll post my codec file below.

    Code:
    Codec: Realtek ALC883
    Address: 0
    Function Id: 0x1
    Vendor Id: 0x10ec0883
    Subsystem Id: 0x1043829e
    Revision Id: 0x100002
    No Modem Function Group found
    Default PCM:
        rates [0x560]: 44100 48000 96000 192000
        bits [0xe]: 16 20 24
        formats [0x1]: PCM
    Default Amp-In caps: N/A
    Default Amp-Out caps: N/A
    GPIO: io=2, o=0, i=0, unsolicited=1, wake=0
      IO[0]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
      IO[1]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
    Node 0x02 [Audio Output] wcaps 0x11: Stereo
      Converter: stream=5, channel=0
      PCM:
        rates [0x560]: 44100 48000 96000 192000
        bits [0xe]: 16 20 24
        formats [0x1]: PCM
    Node 0x03 [Audio Output] wcaps 0x11: Stereo
      Converter: stream=5, channel=0
      PCM:
        rates [0x560]: 44100 48000 96000 192000
        bits [0xe]: 16 20 24
        formats [0x1]: PCM
    Node 0x04 [Audio Output] wcaps 0x11: Stereo
      Converter: stream=5, channel=0
      PCM:
        rates [0x560]: 44100 48000 96000 192000
        bits [0xe]: 16 20 24
        formats [0x1]: PCM
    Node 0x05 [Audio Output] wcaps 0x11: Stereo
      Converter: stream=5, channel=0
      PCM:
        rates [0x560]: 44100 48000 96000 192000
        bits [0xe]: 16 20 24
        formats [0x1]: PCM
    Node 0x06 [Audio Output] wcaps 0x211: Stereo Digital
      Converter: stream=5, channel=0
      Digital:
      Digital category: 0x0
      PCM:
        rates [0x560]: 44100 48000 96000 192000
        bits [0x1e]: 16 20 24 32
        formats [0x1]: PCM
    Node 0x07 [Vendor Defined Widget] wcaps 0xf00000: Mono
    Node 0x08 [Audio Input] wcaps 0x10011b: Stereo Amp-In
      Amp-In caps: ofs=0x08, nsteps=0x1f, stepsize=0x05, mute=1
      Amp-In vals:  [0x1c 0x1c]
      Converter: stream=0, channel=0
      SDI-Select: 0
      PCM:
        rates [0x160]: 44100 48000 96000
        bits [0x6]: 16 20
        formats [0x1]: PCM
      Connection: 1
         0x23
    Node 0x09 [Audio Input] wcaps 0x10011b: Stereo Amp-In
      Amp-In caps: ofs=0x08, nsteps=0x1f, stepsize=0x05, mute=1
      Amp-In vals:  [0x00 0x00]
      Converter: stream=0, channel=0
      SDI-Select: 0
      PCM:
        rates [0x160]: 44100 48000 96000
        bits [0x6]: 16 20
        formats [0x1]: PCM
      Connection: 1
         0x22
    Node 0x0a [Audio Input] wcaps 0x100391: Stereo Digital
      Converter: stream=0, channel=0
      SDI-Select: 0
      Digital:
      Digital category: 0x0
      PCM:
        rates [0x560]: 44100 48000 96000 192000
        bits [0x1e]: 16 20 24 32
        formats [0x1]: PCM
      Unsolicited: tag=00, enabled=0
      Connection: 1
         0x1f
    Node 0x0b [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
      Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1
      Amp-In vals:  [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
      Connection: 10
         0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x17
    Node 0x0c [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
      Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
      Amp-In vals:  [0x00 0x00] [0x00 0x00]
      Amp-Out caps: ofs=0x1f, nsteps=0x1f, stepsize=0x05, mute=0
      Amp-Out vals:  [0x00 0x00]
      Connection: 2
         0x02 0x0b
    Node 0x0d [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
      Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
      Amp-In vals:  [0x00 0x00] [0x00 0x00]
      Amp-Out caps: ofs=0x1f, nsteps=0x1f, stepsize=0x05, mute=0
      Amp-Out vals:  [0x00 0x00]
      Connection: 2
         0x03 0x0b
    Node 0x0e [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
      Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
      Amp-In vals:  [0x00 0x00] [0x00 0x00]
      Amp-Out caps: ofs=0x1f, nsteps=0x1f, stepsize=0x05, mute=0
      Amp-Out vals:  [0x00 0x00]
      Connection: 2
         0x04 0x0b
    Node 0x0f [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
      Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
      Amp-In vals:  [0x00 0x00] [0x00 0x00]
      Amp-Out caps: ofs=0x1f, nsteps=0x1f, stepsize=0x05, mute=0
      Amp-Out vals:  [0x00 0x00]
      Connection: 2
         0x05 0x0b
    Node 0x10 [Vendor Defined Widget] wcaps 0xf00000: Mono
    Node 0x11 [Vendor Defined Widget] wcaps 0xf00000: Mono
    Node 0x12 [Vendor Defined Widget] wcaps 0xf00000: Mono
    Node 0x13 [Vendor Defined Widget] wcaps 0xf00000: Mono
    Node 0x14 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
      Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
      Amp-In vals:  [0x00 0x00]
      Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
      Amp-Out vals:  [0x00 0x00]
      Pincap 0x0000003e: IN OUT HP Detect Trigger
      Pin Default 0x01014410: [Jack] Line Out at Ext Rear
        Conn = 1/8, Color = Green
        DefAssociation = 0x1, Sequence = 0x0
      Pin-ctls: 0x40: OUT
      Unsolicited: tag=00, enabled=0
      Connection: 5
         0x0c* 0x0d 0x0e 0x0f 0x26
    Node 0x15 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
      Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
      Amp-In vals:  [0x00 0x00]
      Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
      Amp-Out vals:  [0x00 0x00]
      Pincap 0x0000003e: IN OUT HP Detect Trigger
      Pin Default 0x01011412: [Jack] Line Out at Ext Rear
        Conn = 1/8, Color = Black
        DefAssociation = 0x1, Sequence = 0x2
      Pin-ctls: 0x40: OUT
      Unsolicited: tag=00, enabled=0
      Connection: 5
         0x0c 0x0d* 0x0e 0x0f 0x26
    Node 0x16 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
      Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
      Amp-In vals:  [0x00 0x00]
      Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
      Amp-Out vals:  [0x00 0x00]
      Pincap 0x0000003e: IN OUT HP Detect Trigger
      Pin Default 0x01016411: [Jack] Line Out at Ext Rear
        Conn = 1/8, Color = Orange
        DefAssociation = 0x1, Sequence = 0x1
      Pin-ctls: 0x40: OUT
      Unsolicited: tag=00, enabled=0
      Connection: 5
         0x0c 0x0d 0x0e* 0x0f 0x26
    Node 0x17 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
      Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
      Amp-In vals:  [0x00 0x00]
      Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
      Amp-Out vals:  [0x00 0x00]
      Pincap 0x0000003e: IN OUT HP Detect Trigger
      Pin Default 0x01012414: [Jack] Line Out at Ext Rear
        Conn = 1/8, Color = Grey
        DefAssociation = 0x1, Sequence = 0x4
      Pin-ctls: 0x40: OUT
      Unsolicited: tag=00, enabled=0
      Connection: 5
         0x0c 0x0d 0x0e 0x0f* 0x26
    Node 0x18 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
      Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
      Amp-In vals:  [0x00 0x00]
      Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
      Amp-Out vals:  [0x80 0x80]
      Pincap 0x0000173e: IN OUT HP Detect Trigger
        Vref caps: HIZ 50 GRD 80
      Pin Default 0x01a19c40: [Jack] Mic at Ext Rear
        Conn = 1/8, Color = Pink
        DefAssociation = 0x4, Sequence = 0x0
      Pin-ctls: 0x24: IN VREF_80
      Unsolicited: tag=00, enabled=0
      Connection: 5
         0x0c* 0x0d 0x0e 0x0f 0x26
    Node 0x19 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
      Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
      Amp-In vals:  [0x00 0x00]
      Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
      Amp-Out vals:  [0x80 0x80]
      Pincap 0x0000173e: IN OUT HP Detect Trigger
        Vref caps: HIZ 50 GRD 80
      Pin Default 0x02a19c50: [Jack] Mic at Ext Front
        Conn = 1/8, Color = Pink
        DefAssociation = 0x5, Sequence = 0x0
      Pin-ctls: 0x24: IN VREF_80
      Unsolicited: tag=00, enabled=0
      Connection: 5
         0x0c* 0x0d 0x0e 0x0f 0x26
    Node 0x1a [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
      Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
      Amp-In vals:  [0x00 0x00]
      Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
      Amp-Out vals:  [0x80 0x80]
      Pincap 0x0000173e: IN OUT HP Detect Trigger
        Vref caps: HIZ 50 GRD 80
      Pin Default 0x0181344f: [Jack] Line In at Ext Rear
        Conn = 1/8, Color = Blue
        DefAssociation = 0x4, Sequence = 0xf
      Pin-ctls: 0x20: IN VREF_HIZ
      Unsolicited: tag=00, enabled=0
      Connection: 5
         0x0c* 0x0d 0x0e 0x0f 0x26
    Node 0x1b [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
      Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
      Amp-In vals:  [0x00 0x00]
      Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
      Amp-Out vals:  [0x00 0x00]
      Pincap 0x0000173e: IN OUT HP Detect Trigger
        Vref caps: HIZ 50 GRD 80
      Pin Default 0x02214c20: [Jack] HP Out at Ext Front
        Conn = 1/8, Color = Green
        DefAssociation = 0x2, Sequence = 0x0
      Pin-ctls: 0xc0: OUT HP VREF_HIZ
      Unsolicited: tag=00, enabled=0
      Connection: 5
         0x0c* 0x0d 0x0e 0x0f 0x26
    Node 0x1c [Pin Complex] wcaps 0x400001: Stereo
      Pincap 0x00000020: IN
      Pin Default 0x593301f0: [N/A] CD at Int ATAPI
        Conn = ATAPI, Color = Unknown
        DefAssociation = 0xf, Sequence = 0x0
        Misc = NO_PRESENCE
      Pin-ctls: 0x00:
    Node 0x1d [Pin Complex] wcaps 0x400000: Mono
      Pincap 0x00000020: IN
      Pin Default 0x4005e601: [N/A] Line Out at Ext N/A
        Conn = Optical, Color = White
        DefAssociation = 0x0, Sequence = 0x1
      Pin-ctls: 0x00:
    Node 0x1e [Pin Complex] wcaps 0x400300: Mono Digital
      Pincap 0x00000010: OUT
      Pin Default 0x01441130: [Jack] SPDIF Out at Ext Rear
        Conn = RCA, Color = Black
        DefAssociation = 0x3, Sequence = 0x0
        Misc = NO_PRESENCE
      Pin-ctls: 0x00:
      Connection: 1
         0x06
    Node 0x1f [Pin Complex] wcaps 0x400200: Mono Digital
      Pincap 0x00000020: IN
      Pin Default 0x411111f0: [N/A] Speaker at Ext Rear
        Conn = 1/8, Color = Black
        DefAssociation = 0xf, Sequence = 0x0
        Misc = NO_PRESENCE
      Pin-ctls: 0x00:
    Node 0x20 [Vendor Defined Widget] wcaps 0xf00040: Mono
      Processing caps: benign=0, ncoeff=17
      Processing Coefficient: 0x00
      Coefficient Index: 0x12
    Node 0x21 [Vendor Defined Widget] wcaps 0xf00000: Mono
    Node 0x22 [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
      Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
      Amp-In vals:  [0x00 0x00] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
      Amp-Out caps: N/A
      Amp-Out vals:  [0x00 0x00]
      Connection: 11
         0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x17 0x0b
    Node 0x23 [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
      Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
      Amp-In vals:  [0x00 0x00] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
      Amp-Out caps: N/A
      Amp-Out vals:  [0x00 0x00]
      Connection: 11
         0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x17 0x0b
    Node 0x24 [Vendor Defined Widget] wcaps 0xf00000: Mono
    Node 0x25 [Audio Output] wcaps 0x11: Stereo
      Converter: stream=0, channel=0
      PCM:
        rates [0x560]: 44100 48000 96000 192000
        bits [0xe]: 16 20 24
        formats [0x1]: PCM
    Node 0x26 [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
      Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
      Amp-In vals:  [0x00 0x00] [0x00 0x00]
      Amp-Out caps: ofs=0x1f, nsteps=0x1f, stepsize=0x05, mute=0
      Amp-Out vals:  [0x00 0x00]
      Connection: 2
         0x25 0x0b

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