[alsa-devel] [PATCH 1/1] sound/usb: Add Asus Xonar U7 Mixer - input support
Piotr G.
pejotr at wp.pl
Sun Jul 26 10:00:12 CEST 2015
Hello,
This is my first patch to alsa-devel, and I'm not very skilled
programmer. From lsusb -vvv, I've draw Xonar U7 map with all IT OT FU CS
in mixer_map.c I don't know why the driver by default doesn't parse all
info correctly. With this patch you can see Line Switch and Mic Switch
in alsamixer. I can record my voice in Audacity with all supported bit
and sampling rates in Mono or Stereo
This is temporary solution. Please correct me if the patch is not
properly made.
What doesn't work:
- Cannot change Capture Volume for Line/Mic. No mixer control in
alsamixer
- Switching between Line/Mic doesn't work (Mute doesn't work)
- SPDIF not tested
As what I wrote at beginning I'm not skilled programmer so any help is
aprreciated
proc-usbmixer -> cat /proc/asound/*/usbmix
usb.debug -> lsusb -vv (only Asus Xonar U7)
---
sound/usb/mixer.c | 23 +++++++++++++++++++++--
sound/usb/mixer_maps.c | 48
++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 69 insertions(+), 2 deletions(-)
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 6b3acba..027d160 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -818,6 +818,25 @@ static struct usb_feature_control_info
audio_feature_info[] = {
{ "Phase Inverter Control", USB_MIXER_BOOLEAN },
};
+static struct usb_feature_control_info uac2_audio_feature_info[] = {
+ /* UAC2 specific */
+ { "Mute Control", USB_MIXER_INV_BOOLEAN },
+ { "Volume Control", USB_MIXER_S16 },
+ { "Bass Control", USB_MIXER_S8 },
+ { "Mid Control", USB_MIXER_S8 },
+ { "Treble Control", USB_MIXER_S8 },
+ { "Graphic Equalizer Control", USB_MIXER_S8 },
+ { "Automatic Gain Control", USB_MIXER_BOOLEAN },
+ { "Delay Control", USB_MIXER_S16 }, /* FIXME: U32 in UAC2 */
+ { "Bass Boost Control", USB_MIXER_BOOLEAN },
+ { "Loudness Control", USB_MIXER_BOOLEAN },
+ { "Input Gain Control", USB_MIXER_S16 },
+ { "Input Gain Pad Control", USB_MIXER_S16 },
+ { "Phase Inverter Control", USB_MIXER_BOOLEAN },
+ { "Underflow Control", USB_MIXER_BOOLEAN },
+ { "Overflow Control", USB_MIXER_BOOLEAN },
+};
+
/* private_free callback */
void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl)
{
@@ -1240,7 +1259,7 @@ static void build_feature_ctl(struct mixer_build
*state, void *raw_desc,
snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
cval->control = control;
cval->cmask = ctl_mask;
- cval->val_type = audio_feature_info[control-1].type;
+ cval->val_type = uac2_audio_feature_info[control-1].type;
if (ctl_mask == 0) {
cval->channels = 1; /* master channel */
cval->master_readonly = readonly_mask;
@@ -1318,7 +1337,7 @@ static void build_feature_ctl(struct mixer_build
*state, void *raw_desc,
break;
default:
if (!len)
- strlcpy(kctl->id.name, audio_feature_info[control-1].name,
+ strlcpy(kctl->id.name, uac2_audio_feature_info[control-1].name,
sizeof(kctl->id.name));
break;
}
diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c
index e5000da..07f510e 100644
--- a/sound/usb/mixer_maps.c
+++ b/sound/usb/mixer_maps.c
@@ -341,6 +341,48 @@ static const struct usbmix_name_map
scms_usb3318_map[] = {
{ 0 }
};
+/* ASUS Xonar U7 - USB CM6632A (ADC CS5361 // DAC Dolby CS4362A // DAC
Stereo CS4398 */
+/* Topology:
+
+USB_IN[1]------->FU[13]-----------CS[18]--->Spk_OUT[7]
+
+Dig_IN[2]------->FU[14]-----------CS[19]--->Dig_OUT[8]
+
+Mic_IN[4]------->FU[16]---+
+ SU[20]--CS[22]--->USB_OUT[11]
+Line_IN[5]------>FU[17]---+
+
+*/
+
+static const struct usbmix_name_map xonar_u7_map[] = {
+ /* 1: IT PCM Analog (USB Streaming) */
+ /* 2: IT PCM2 Digital (USB Streaming) */
+ /* 4: IT Microphone */
+ /* 5: IT Line IN */
+ /* 7: OT Speaker */
+ /* 8: OT SPDIF */
+ /* 11 OT Capture Playback (USB Streaming) */
+ { 13, "Speaker Playback" }, /* 13 FU Speaker Out Mute/Volume */
+ { 14, "IEC958 Playback" }, /* 14 FU SPDIF Out Mute/Volume */
+ { 16, "Mic Capture" }, /* 16 FU Capture Mic-in Mute/Volume */
+ { 17, "Line Capture" }, /* 17 FU Capture Line-in Mute/Volume */
+ /* 18 CS for 1 PCM (USB Streaming) Clock Source */
+ /* 19 CS for 2 SPDIF (USB Streaming) Clock Source */
+ { 20, "Capture Source" }, /* 20 SU Capture Source Selector */
+ /* 22 CS Line-in and Mic-in Clock Source */
+ { 0 }
+};
+
+static struct usbmix_selector_map xonar_u7_selectors[] = {
+{
+ .id = 20,
+ .count = 2,
+ .names = (const char*[]) {"Mic", "Line"}
+ },
+ { 0 } /* terminator */
+
+};
+
/*
* Control map entries
*/
@@ -451,6 +493,12 @@ static struct usbmix_ctl_map usbmix_ctl_maps[] = {
.id = USB_ID(0x25c4, 0x0003),
.map = scms_usb3318_map,
},
+ {
+ /* Asus Xonar U7 */
+ .id = USB_ID(0x1043, 0x857c),
+ .map = xonar_u7_map,
+ .selector_map = xonar_u7_selectors,
+ },
{ 0 } /* terminator */
};
--
2.3.6
-------------- next part --------------
Bus 004 Device 004: ID 1043:857c iCreate Technologies Corp.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
idVendor 0x1043 iCreate Technologies Corp.
idProduct 0x857c
bcdDevice 1.10
iManufacturer 1 ASUS
iProduct 2 Xonar U7
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 1010
bNumInterfaces 5
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Association:
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bFirstInterface 0
bInterfaceCount 4
bFunctionClass 1 Audio
bFunctionSubClass 0
bFunctionProtocol 32
iFunction 0
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bDescriptorType 4
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bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 1 Control Device
bInterfaceProtocol 32
iInterface 0
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdADC 2.00
bCategory 10
wTotalLength 256
bmControl 0x00
AudioControl Interface Descriptor:
bLength 17
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 1
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bCSourceID 18
bNrChannels 0
bmChannelConfig 0x00000000
bmControls 0x0040
Cluster Control (read-only)
iChannelNames 0
iTerminal 0
AudioControl Interface Descriptor:
bLength 17
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 2
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bCSourceID 19
bNrChannels 0
bmChannelConfig 0x00000000
bmControls 0x0040
Cluster Control (read-only)
iChannelNames 0
iTerminal 0
AudioControl Interface Descriptor:
bLength 17
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 4
wTerminalType 0x0201 Microphone
bAssocTerminal 0
bCSourceID 22
bNrChannels 2
bmChannelConfig 0x00000003
Front Left (FL)
Front Right (FR)
bmControls 0x0044
Connector Control (read-only)
Cluster Control (read-only)
iChannelNames 0
iTerminal 0
AudioControl Interface Descriptor:
bLength 17
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 5
wTerminalType 0x0603 Line Connector
bAssocTerminal 0
bCSourceID 22
bNrChannels 2
bmChannelConfig 0x00000003
Front Left (FL)
Front Right (FR)
bmControls 0x0044
Connector Control (read-only)
Cluster Control (read-only)
iChannelNames 0
iTerminal 0
AudioControl Interface Descriptor:
bLength 12
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 7
wTerminalType 0x0301 Speaker
bAssocTerminal 0
bSourceID 13
bCSourceID 18
bmControls 0xc004
Connector Control (read-only)
iTerminal 0
AudioControl Interface Descriptor:
bLength 12
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 8
wTerminalType 0x0605 SPDIF interface
bAssocTerminal 0
bSourceID 14
bCSourceID 19
bmControls 0x0004
Connector Control (read-only)
iTerminal 0
AudioControl Interface Descriptor:
bLength 12
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 11
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bSourceID 20
bCSourceID 22
bmControls 0x0000
iTerminal 0
AudioControl Interface Descriptor:
bLength 42
bDescriptorType 36
bDescriptorSubtype 6 (FEATURE_UNIT)
bUnitID 13
bSourceID 1
bmaControls( 0) 0x00000003
Mute Control (read/write)
bmaControls( 1) 0x00c0000c
Volume Control (read/write)
Input gain pad Control (read/write)
bmaControls( 2) 0x00c0000c
Volume Control (read/write)
Input gain pad Control (read/write)
bmaControls( 3) 0x0000000c
Volume Control (read/write)
bmaControls( 4) 0x0000000c
Volume Control (read/write)
bmaControls( 5) 0x0000000c
Volume Control (read/write)
bmaControls( 6) 0x0000000c
Volume Control (read/write)
bmaControls( 7) 0x0000000c
Volume Control (read/write)
bmaControls( 8) 0x0000000c
Volume Control (read/write)
iFeature 0
AudioControl Interface Descriptor:
bLength 18
bDescriptorType 36
bDescriptorSubtype 6 (FEATURE_UNIT)
bUnitID 14
bSourceID 2
bmaControls( 0) 0x00000003
Mute Control (read/write)
bmaControls( 1) 0x00000000
bmaControls( 2) 0x00000000
iFeature 0
AudioControl Interface Descriptor:
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bDescriptorType 36
bDescriptorSubtype 6 (FEATURE_UNIT)
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bSourceID 4
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bmControls 0x07
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AudioControl Interface Descriptor:
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AudioControl Interface Descriptor:
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bmControls 0x07
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Clock Validity Control (read-only)
bAssocTerminal 0
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AudioControl Interface Descriptor:
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bDescriptorType 36
bDescriptorSubtype 5 (SELECTOR_UNIT)
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baSource( 0) 16
baSource( 1) 17
bmControls 0x03
Selector Control (read/write)
iSelector 0
Endpoint Descriptor:
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bEndpointAddress 0x8f EP 15 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0006 1x 6 bytes
bInterval 4
Interface Descriptor:
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bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 32
iInterface 4 Speaker
Interface Descriptor:
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bDescriptorType 4
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iInterface 0
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bDescriptorSubtype 1 (AS_GENERAL)
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PCM
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Endpoint Descriptor:
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PCM
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Endpoint Descriptor:
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bEndpointAddress 0x85 EP 5 IN
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bInterval 4
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bmFormats 0x00000001
PCM
bNrChannels 8
bmChannelConfig 0x0000063f
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bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
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bInterval 1
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bLength 8
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bmControls 0x00
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wLockDelay 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x85 EP 5 IN
bmAttributes 17
Transfer Type Isochronous
Synch Type None
Usage Type Feedback
wMaxPacketSize 0x0004 1x 4 bytes
bInterval 4
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 32
iInterface 5 SPDIF Output
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 1
bNumEndpoints 2
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 32
iInterface 0
AudioStreaming Interface Descriptor:
bLength 16
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 2
bmControls 0x05
Active Alternate Setting Control (read-only)
Valid Alternate Setting Control (read-only)
bFormatType 1
bmFormats 0x00000001
PCM
bNrChannels 2
bmChannelConfig 0x00000003
Front Left (FL)
Front Right (FR)
iChannelNames 0
AudioStreaming Interface Descriptor:
bLength 6
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bSubslotSize 2
bBitResolution 16
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x06 EP 6 OUT
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0068 1x 104 bytes
bInterval 1
AudioControl Endpoint Descriptor:
bLength 8
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bmControls 0x00
bLockDelayUnits 0 Undefined
wLockDelay 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x86 EP 6 IN
bmAttributes 17
Transfer Type Isochronous
Synch Type None
Usage Type Feedback
wMaxPacketSize 0x0004 1x 4 bytes
bInterval 4
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 2
bNumEndpoints 2
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 32
iInterface 0
AudioStreaming Interface Descriptor:
bLength 16
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 2
bmControls 0x05
Active Alternate Setting Control (read-only)
Valid Alternate Setting Control (read-only)
bFormatType 1
bmFormats 0x00000001
PCM
bNrChannels 2
bmChannelConfig 0x00000003
Front Left (FL)
Front Right (FR)
iChannelNames 0
AudioStreaming Interface Descriptor:
bLength 6
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bSubslotSize 3
bBitResolution 24
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x06 EP 6 OUT
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x009c 1x 156 bytes
bInterval 1
AudioControl Endpoint Descriptor:
bLength 8
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bmControls 0x00
bLockDelayUnits 0 Undefined
wLockDelay 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x86 EP 6 IN
bmAttributes 17
Transfer Type Isochronous
Synch Type None
Usage Type Feedback
wMaxPacketSize 0x0004 1x 4 bytes
bInterval 4
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 3
bNumEndpoints 2
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 32
iInterface 0
AudioStreaming Interface Descriptor:
bLength 16
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 2
bmControls 0x05
Active Alternate Setting Control (read-only)
Valid Alternate Setting Control (read-only)
bFormatType 3
bmFormats 0x00001381
PCM
bNrChannels 2
bmChannelConfig 0x00000003
Front Left (FL)
Front Right (FR)
iChannelNames 0
AudioStreaming Interface Descriptor:
bLength 6
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 3 (FORMAT_TYPE_III)
bSubslotSize 2
bBitResolution 16
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x06 EP 6 OUT
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0068 1x 104 bytes
bInterval 1
AudioControl Endpoint Descriptor:
bLength 8
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bmControls 0x00
bLockDelayUnits 0 Undefined
wLockDelay 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x86 EP 6 IN
bmAttributes 17
Transfer Type Isochronous
Synch Type None
Usage Type Feedback
wMaxPacketSize 0x0004 1x 4 bytes
bInterval 4
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 32
iInterface 9 Input
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 32
iInterface 0
AudioStreaming Interface Descriptor:
bLength 16
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 11
bmControls 0x05
Active Alternate Setting Control (read-only)
Valid Alternate Setting Control (read-only)
bFormatType 1
bmFormats 0x00000001
PCM
bNrChannels 2
bmChannelConfig 0x00000003
Front Left (FL)
Front Right (FR)
iChannelNames 0
AudioStreaming Interface Descriptor:
bLength 6
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bSubslotSize 2
bBitResolution 16
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x88 EP 8 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0068 1x 104 bytes
bInterval 1
AudioControl Endpoint Descriptor:
bLength 8
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bmControls 0x00
bLockDelayUnits 0 Undefined
wLockDelay 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 2
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 32
iInterface 0
AudioStreaming Interface Descriptor:
bLength 16
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 11
bmControls 0x05
Active Alternate Setting Control (read-only)
Valid Alternate Setting Control (read-only)
bFormatType 1
bmFormats 0x00000001
PCM
bNrChannels 2
bmChannelConfig 0x00000003
Front Left (FL)
Front Right (FR)
iChannelNames 0
AudioStreaming Interface Descriptor:
bLength 6
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bSubslotSize 3
bBitResolution 24
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x88 EP 8 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x009c 1x 156 bytes
bInterval 1
AudioControl Endpoint Descriptor:
bLength 8
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bmControls 0x00
bLockDelayUnits 0 Undefined
wLockDelay 0
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 4
bInterfaceCount 1
bFunctionClass 3 Human Interface Device
bFunctionSubClass 0
bFunctionProtocol 0
iFunction 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 4
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.00
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 50
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0010 1x 16 bytes
bInterval 4
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)
-------------- next part --------------
USB Mixer: usb_id=0x1043857c, ctrlif=0, ctlerr=0
Card: ASUS Xonar U7 at usb-0000:00:13.2-5, high speed
Unit: 13
Control: name="Speaker Playback", index=0
Info: id=13, control=12, cmask=0x3, channels=2, type="S16"
Volume: min=-3072, max=0, dBmin=-1200, dBmax=0
Unit: 13
Control: name="Speaker Playback Volume", index=0
Info: id=13, control=2, cmask=0xff, channels=8, type="S16"
Volume: min=-32512, max=0, dBmin=-12700, dBmax=0
Unit: 13
Control: name="Speaker Playback Switch", index=0
Info: id=13, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
Volume: min=0, max=1, dBmin=0, dBmax=0
Unit: 14
Control: name="IEC958 Playback Switch", index=0
Info: id=14, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
Volume: min=0, max=1, dBmin=0, dBmax=0
Unit: 16
Control: name="Mic Capture Switch", index=0
Info: id=16, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
Volume: min=0, max=1, dBmin=0, dBmax=0
Unit: 17
Control: name="Line Capture Switch", index=0
Info: id=17, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
Volume: min=0, max=1, dBmin=0, dBmax=0
Unit: 20
Control: name="Capture Source", index=0
Info: id=20, control=1, cmask=0x0, channels=1, type="U8"
Volume: min=1, max=2, dBmin=0, dBmax=0
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