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Re: [Alsa-user] controling volume from a Plantronics USB headset?

From: Louis-David Mitterrand

On Tue, Aug 29, 2006 at 08:37:41PM +0100, Andrew Lyon wrote:
> On 8/29/06, Louis-David Mitterrand <vindex+lists-alsa-user@...> wrote:
> >
> > Indeed! The volume control acts on /dev/input/event2.

I haden't noticed up to now but the headset's volume control actually 
sends VolumeUp and VolumeDown events to the X server, which my window 
manager acts upon for sound card #1 (headset being #2). So no need for a 
separate daemon here, a simple reconfiguration of my wm will suffice.

What I'd like to understand is why these events are visible to the X 
server (using xev)? My /etc/X11/xorg.conf has no particular section for 
the headset.

> > And I discovered my keyboard volume knob also uses that interface.
> 
> then often do..
> 
> you can also use lircd with dev/input driver to  read these events,
> although i think that support has been moved into a separate daemon
> called inputlircd, at least it has on my gentoo system.

Same here on debian.

> i would be interested to hear if you get it working as I have similar
> devices and have never looked into setting up the buttons.

I'd rather try to direct the volume knob events towards X and capture 
them at the wm level, but they don't appear in xev. I tried making a new 
section in xorg.conf with /dev/input/event2 and Driver "mouse" and the 
events do appear but interfere with the pointer (no surprise there ;).

It boggles me that headset volume events appear in xev(1) and not 
keyboard volume knob ones... but that is off-topic to alsa.

Cheers,

Thread View

Thread	Author	Date
[Alsa-user] controling volume from a Plantronics USB headset?	Louis-David Mitterrand

Re: [Alsa-user] controling volume from a Plantronics USB headset?

From: Clemens Ladisch <cladisch@fa...> - 2006-08-29 14:23

Louis-David Mitterrand wrote:
> My Plantronics USB headset works well with alsa, except for the mute and 
> volume controls located on the cord. 

What is the output of "lsusb -v" for this device?


Regards,
Clemens

Re: [Alsa-user] controling volume from a Plantronics USB headset?

From: Andrew Lyon <andrew.lyon@gm...> - 2006-08-29 14:25

On 8/29/06, Louis-David Mitterrand <vindex+lists-alsa-user@...> wrote:
> Hello,
>
> My Plantronics USB headset works well with alsa, except for the mute and
> volume controls located on the cord.
>
> How can I use them with alsa?
>

If they are detected as input devices (cat /proc/bus/input/devices
identify the device, then cat /dev/input/eventX and press buttons to
check that it works), then you can use a daemon like gizmod
(gizmod.sourceforge.net) to make things happen when you press the
buttons.

Andy

Re: [Alsa-user] controling volume from a Plantronics USB headset?

From: Louis-David Mitterrand

On Tue, Aug 29, 2006 at 04:23:16PM +0200, Clemens Ladisch wrote:
> Louis-David Mitterrand wrote:
> > My Plantronics USB headset works well with alsa, except for the mute and 
> > volume controls located on the cord. 
> 
> What is the output of "lsusb -v" for this device?

Bus 002 Device 002: ID 047f:0ca1 Plantronics, Inc. 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         8
  idVendor           0x047f Plantronics, Inc.
  idProduct          0x0ca1 
  bcdDevice            0.04
  iManufacturer           1 
  iProduct                2 
  iSerial                 3 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          369
    bNumInterfaces          4
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      1 Control Device
      bInterfaceProtocol      0 
      iInterface              0 
      AudioControl Interface Descriptor:
        bLength                10
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdADC               1.00
        wTotalLength           78
        bInCollection           2
        baInterfaceNr( 0)       1
        baInterfaceNr( 1)       2
      AudioControl Interface Descriptor:
        bLength                12
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID            12
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bNrChannels             2
        wChannelConfig     0x0003
          Left Front (L)
          Right Front (R)
        iChannelNames           0 
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                13
        bDescriptorType        36
        bDescriptorSubtype      6 (FEATURE_UNIT)
        bUnitID                 1
        bSourceID              12
        bControlSize            2
        bmaControls( 0)      0x55
        bmaControls( 0)      0x01
          Mute
          Bass
          Treble
          Automatic Gain
          Bass Boost
        bmaControls( 1)      0x02
        bmaControls( 1)      0x00
          Volume
        bmaControls( 2)      0x02
        bmaControls( 2)      0x00
          Volume
        iFeature                0 
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID            20
        wTerminalType      0x0301 Speaker
        bAssocTerminal          0
        bSourceID               1
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                12
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID            10
        wTerminalType      0x0201 Microphone
        bAssocTerminal          0
        bNrChannels             2
        wChannelConfig     0x0003
          Left Front (L)
          Right Front (R)
        iChannelNames           0 
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                13
        bDescriptorType        36
        bDescriptorSubtype      6 (FEATURE_UNIT)
        bUnitID                 2
        bSourceID              10
        bControlSize            2
        bmaControls( 0)      0x03
        bmaControls( 0)      0x00
          Mute
          Volume
        bmaControls( 1)      0x00
        bmaControls( 1)      0x00
        bmaControls( 2)      0x00
        bmaControls( 2)      0x00
        iFeature                0 
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID            13
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bSourceID               2
        iTerminal               0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      AudioStreaming Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink          12
        bDelay                  0 frames
        wFormatTag              1 PCM
      AudioStreaming Interface Descriptor:
        bLength                14
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             1
        bSubframeSize           2
        bBitResolution         16
        bSamFreqType            0 Continuous
        tLowerSamFreq        6400
        tUpperSamFreq       48000
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            9
          Transfer Type            Isochronous
          Synch Type               Adaptive
          Usage Type               Data
        wMaxPacketSize     0x0064  1x 100 bytes
        bInterval               1
        bRefresh                0
        bSynchAddress           0
        AudioControl Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x01
            Sampling Frequency
          bLockDelayUnits         2 Decoded PCM samples
          wLockDelay              1 Decoded PCM samples
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       2
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      AudioStreaming Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink          12
        bDelay                  0 frames
        wFormatTag              1 PCM
      AudioStreaming Interface Descriptor:
        bLength                14
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             2
        bSubframeSize           2
        bBitResolution         16
        bSamFreqType            0 Continuous
        tLowerSamFreq        6400
        tUpperSamFreq       48000
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            9
          Transfer Type            Isochronous
          Synch Type               Adaptive
          Usage Type               Data
        wMaxPacketSize     0x00c8  1x 200 bytes
        bInterval               1
        bRefresh                0
        bSynchAddress           0
        AudioControl Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x01
            Sampling Frequency
          bLockDelayUnits         2 Decoded PCM samples
          wLockDelay              1 Decoded PCM samples
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      AudioStreaming Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink          13
        bDelay                  0 frames
        wFormatTag              1 PCM
      AudioStreaming Interface Descriptor:
        bLength                14
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             1
        bSubframeSize           1
        bBitResolution          8
        bSamFreqType            0 Continuous
        tLowerSamFreq        6400
        tUpperSamFreq       48000
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x84  EP 4 IN
        bmAttributes            9
          Transfer Type            Isochronous
          Synch Type               Adaptive
          Usage Type               Data
        wMaxPacketSize     0x0032  1x 50 bytes
        bInterval               1
        bRefresh                0
        bSynchAddress           0
        AudioControl Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x01
            Sampling Frequency
          bLockDelayUnits         2 Decoded PCM samples
          wLockDelay              1 Decoded PCM samples
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       2
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      AudioStreaming Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink          13
        bDelay                  0 frames
        wFormatTag              1 PCM
      AudioStreaming Interface Descriptor:
        bLength                14
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             1
        bSubframeSize           2
        bBitResolution         16
        bSamFreqType            0 Continuous
        tLowerSamFreq        6400
        tUpperSamFreq       48000
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x84  EP 4 IN
        bmAttributes            9
          Transfer Type            Isochronous
          Synch Type               Adaptive
          Usage Type               Data
        wMaxPacketSize     0x0064  1x 100 bytes
        bInterval               1
        bRefresh                0
        bSynchAddress           0
        AudioControl Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x01
            Sampling Frequency
          bLockDelayUnits         2 Decoded PCM samples
          wLockDelay              1 Decoded PCM samples
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bIcannot read device status, Operation not permitted (1)
nterfaceNumber        2
      bAlternateSetting       3
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      AudioStreaming Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink          13
        bDelay                  0 frames
        wFormatTag              1 PCM
      AudioStreaming Interface Descriptor:
        bLength                14
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             2
        bSubframeSize           2
        bBitResolution         16
        bSamFreqType            0 Continuous
        tLowerSamFreq        6400
        tUpperSamFreq       48000
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x84  EP 4 IN
        bmAttributes            9
          Transfer Type            Isochronous
          Synch Type               Adaptive
          Usage Type               Data
        wMaxPacketSize     0x00c8  1x 200 bytes
        bInterval               1
        bRefresh                0
        bSynchAddress           0
        AudioControl Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x01
            Sampling Frequency
          bLockDelayUnits         2 Decoded PCM samples
          wLockDelay              1 Decoded PCM samples
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Devices
      bInterfaceSubClass      0 No Subclass
      bInterfaceProtocol      0 None
      iInterface              0 
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.00
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength      57
         Report Descriptors: 
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0002  1x 2 bytes
        bInterval               3

Re: [Alsa-user] controling volume from a Plantronics USB headset?

From: Louis-David Mitterrand

On Tue, Aug 29, 2006 at 03:24:45PM +0100, Andrew Lyon wrote:
> On 8/29/06, Louis-David Mitterrand <vindex+lists-alsa-user@...> wrote:
> > Hello,
> >
> > My Plantronics USB headset works well with alsa, except for the mute and
> > volume controls located on the cord.
> >
> > How can I use them with alsa?
> 
> If they are detected as input devices (cat /proc/bus/input/devices
> identify the device, then cat /dev/input/eventX and press buttons to
> check that it works), then you can use a daemon like gizmod
> (gizmod.sourceforge.net) to make things happen when you press the
> buttons.

Indeed! The volume control acts on /dev/input/event2.

The mute button however doesn't seem to trigger any event.

And I discovered my keyboard volume knob also uses that interface.

Thanks a lot

Re: [Alsa-user] controling volume from a Plantronics USB headset?

From: Andrew Lyon <andrew.lyon@gm...> - 2006-08-29 19:39

On 8/29/06, Louis-David Mitterrand <vindex+lists-alsa-user@...> wrote:
> On Tue, Aug 29, 2006 at 03:24:45PM +0100, Andrew Lyon wrote:
> > On 8/29/06, Louis-David Mitterrand <vindex+lists-alsa-user@...> wrote:
> > > Hello,
> > >
> > > My Plantronics USB headset works well with alsa, except for the mute and
> > > volume controls located on the cord.
> > >
> > > How can I use them with alsa?
> >
> > If they are detected as input devices (cat /proc/bus/input/devices
> > identify the device, then cat /dev/input/eventX and press buttons to
> > check that it works), then you can use a daemon like gizmod
> > (gizmod.sourceforge.net) to make things happen when you press the
> > buttons.
>
> Indeed! The volume control acts on /dev/input/event2.
>
> The mute button however doesn't seem to trigger any event.

check dmesg, it might be sending a unrecognised event.. but be aware
im not a expert on these things!

or perhaps mute is a different type of button...

>
> And I discovered my keyboard volume knob also uses that interface.

then often do..

you can also use lircd with dev/input driver to  read these events,
although i think that support has been moved into a separate daemon
called inputlircd, at least it has on my gentoo system.

i would be interested to hear if you get it working as I have similar
devices and have never looked into setting up the buttons.

andy

> Thanks a lot
>
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Re: [Alsa-user] controling volume from a Plantronics USB headset?

From: Louis-David Mitterrand

On Tue, Aug 29, 2006 at 08:37:41PM +0100, Andrew Lyon wrote:
> On 8/29/06, Louis-David Mitterrand <vindex+lists-alsa-user@...> wrote:
> >
> > Indeed! The volume control acts on /dev/input/event2.

I haden't noticed up to now but the headset's volume control actually 
sends VolumeUp and VolumeDown events to the X server, which my window 
manager acts upon for sound card #1 (headset being #2). So no need for a 
separate daemon here, a simple reconfiguration of my wm will suffice.

What I'd like to understand is why these events are visible to the X 
server (using xev)? My /etc/X11/xorg.conf has no particular section for 
the headset.

> > And I discovered my keyboard volume knob also uses that interface.
> 
> then often do..
> 
> you can also use lircd with dev/input driver to  read these events,
> although i think that support has been moved into a separate daemon
> called inputlircd, at least it has on my gentoo system.

Same here on debian.

> i would be interested to hear if you get it working as I have similar
> devices and have never looked into setting up the buttons.

I'd rather try to direct the volume knob events towards X and capture 
them at the wm level, but they don't appear in xev. I tried making a new 
section in xorg.conf with /dev/input/event2 and Driver "mouse" and the 
events do appear but interfere with the pointer (no surprise there ;).

It boggles me that headset volume events appear in xev(1) and not 
keyboard volume knob ones... but that is off-topic to alsa.

Cheers,