AK4571 Datasheet, PDF (29/54 Pages) Asahi Kasei Microsystems – USB I/F Audio CODEC

ASAHI KASEI
[AK4571]
3.3.7. Feature Unit Desciptor(ID=5)
Microphone Recording Volume Unit
Offset Field
Size Value
0 Blength
1 0x08
1 BdescriptorType
1 0x24
2 BdescriptorSubtype 1 0x06
3 BunitID
1 0x05
4 BsourceID
1 0x07
5 BcontrolSize
1 0x01
6 bmaControls(0)
1 0x03
7 Ifeature
1 0x00
3.3.8. Feature Unit Desciptor(ID=6)
Microphone Playback Volume Unit
Offset Field
Size Value
0 Blength
1 0x08
1 BdescriptorType
1 0x24
2 BdescriptorSubtype 1 0x06
3 BunitID
1 0x06
4 BsourceID
1 0x01
5 BcontrolSize
1 0x01
6 bmaControls(0)
1 0x03
7 Ifeature
1 0x00
3.3.9. Feature Unit Desciptor(ID=8)
Lineout Volume/Bass Boost Unit
Offset Field
Size Value
0 blength
1 0x0D
1 bdescriptorType
1 0x24
2 bdescriptorSubtype 1 0x06
3 bunitID
1 0x08
4 BsourceID
1 0x09
5 BcontrolSize
1 0x02
6 bmaControls(0)
1 0x0101
8 bmaControls(1)
10 bmaControls(2)
12 IFeature
1 0x0002
1 0x0002
1 0x00
Description
Size of this descriptor
CS_INTERFACE
FEATURE_UNIT descriptor subtype
ID of this feature Unit
From Selector Unit
One byte Control Array
D0(Mute), D1(Volume) supported
Unused
Description
Size of this descriptor
CS_INTERFACE
FEATURE_UNIT descriptor subtype
ID of this feature Unit
From Input Terminal (Microphone)
One byte Control Array
D0(Mute) D1(Volume) supported
Unused
Description
Size of this descriptor
CS_INTERFACE
FEATURE_UNIT descriptor subtype
ID of this feature Unit
From Mixer Unit(ID9)
Two byte Control Array
D0(Mute) , D8(Bass Boost)is enable for
channel0
D1(Volume) control is enable for channel 1
D1(Volume) control is enable for channel 2
Unused
MS0153-J-02
- 29 -
2003/3