Here is unimix -dev1 -list output
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Command line mixer for UNIAUD32. Version 1.1
Detected UNIAUD version 2.02.05
Detected 2 audio adapter(s)
Control list for adapter 1
Control ID: 1
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Front Playback Volume]
Index: 0
Element type: integer type
Count of values: 2
Value:
Bounds: min: 0, max: 64, step: 0
value 0: 64
value 1: 64
Control ID: 2
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Front Playback Switch]
Index: 0
Element type: boolean type
Count of values: 2
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 1
value 1: 1
Control ID: 3
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Surround Playback Volume]
Index: 0
Element type: integer type
Count of values: 2
Value:
Bounds: min: 0, max: 64, step: 0
value 0: 64
value 1: 64
Control ID: 4
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Surround Playback Switch]
Index: 0
Element type: boolean type
Count of values: 2
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 1
value 1: 1
Control ID: 5
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Center Playback Volume]
Index: 0
Element type: integer type
Count of values: 1
Value:
Bounds: min: 0, max: 64, step: 0
value 0: 64
Control ID: 6
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [LFE Playback Volume]
Index: 0
Element type: integer type
Count of values: 1
Value:
Bounds: min: 0, max: 64, step: 0
value 0: 64
Control ID: 7
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Center Playback Switch]
Index: 0
Element type: boolean type
Count of values: 1
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 1
Control ID: 8
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [LFE Playback Switch]
Index: 0
Element type: boolean type
Count of values: 1
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 1
Control ID: 9
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Side Playback Volume]
Index: 0
Element type: integer type
Count of values: 2
Value:
Bounds: min: 0, max: 64, step: 0
value 0: 64
value 1: 64
Control ID: 10
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Side Playback Switch]
Index: 0
Element type: boolean type
Count of values: 2
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 1
value 1: 1
Control ID: 11
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Headphone Playback Volume]
Index: 0
Element type: integer type
Count of values: 2
Value:
Bounds: min: 0, max: 64, step: 0
value 0: 64
value 1: 64
Control ID: 12
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Headphone Playback Switch]
Index: 0
Element type: boolean type
Count of values: 2
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 1
value 1: 1
Control ID: 13
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Front Mic Playback Volume]
Index: 0
Element type: integer type
Count of values: 2
Value:
Bounds: min: 0, max: 31, step: 0
value 0: 0
value 1: 0
Control ID: 14
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Front Mic Playback Switch]
Index: 0
Element type: boolean type
Count of values: 2
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 0
value 1: 0
Control ID: 15
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Rear Mic Playback Volume]
Index: 0
Element type: integer type
Count of values: 2
Value:
Bounds: min: 0, max: 31, step: 0
value 0: 0
value 1: 0
Control ID: 16
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Rear Mic Playback Switch]
Index: 0
Element type: boolean type
Count of values: 2
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 0
value 1: 0
Control ID: 17
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Line Playback Volume]
Index: 0
Element type: integer type
Count of values: 2
Value:
Bounds: min: 0, max: 31, step: 0
value 0: 0
value 1: 0
Control ID: 18
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Line Playback Switch]
Index: 0
Element type: boolean type
Count of values: 2
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 0
value 1: 0
Control ID: 19
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Auto-Mute Mode]
Index: 0
Element type: enumerated type
Count of values: 1
Value:
Bounds: items: 2, item: 0, name: [Disabled]
value 0: 1
Control ID: 20
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Input Source]
Index: 0
Element type: enumerated type
Count of values: 1
Value:
Bounds: items: 3, item: 0, name: [Front Mic]
value 0: 0
Control ID: 21
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Input Source]
Index: 1
Element type: enumerated type
Count of values: 1
Value:
Bounds: items: 3, item: 0, name: [Front Mic]
value 0: 0
Control ID: 22
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Capture Volume]
Index: 0
Element type: integer type
Count of values: 2
Value:
Bounds: min: 0, max: 46, step: 0
value 0: 0
value 1: 0
Control ID: 23
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Capture Switch]
Index: 0
Element type: boolean type
Count of values: 2
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 0
value 1: 0
Control ID: 24
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Capture Volume]
Index: 1
Element type: integer type
Count of values: 2
Value:
Bounds: min: 0, max: 46, step: 0
value 0: 0
value 1: 0
Control ID: 25
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Capture Switch]
Index: 1
Element type: boolean type
Count of values: 2
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 0
value 1: 0
Control ID: 26
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Front Mic Boost Volume]
Index: 0
Element type: integer type
Count of values: 2
Value:
Bounds: min: 0, max: 3, step: 0
value 0: 0
value 1: 0
Control ID: 27
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Rear Mic Boost Volume]
Index: 0
Element type: integer type
Count of values: 2
Value:
Bounds: min: 0, max: 3, step: 0
value 0: 0
value 1: 0
Control ID: 28
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Line Boost Volume]
Index: 0
Element type: integer type
Count of values: 2
Value:
Bounds: min: 0, max: 3, step: 0
value 0: 0
value 1: 0
Control ID: 29
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Master Playback Volume]
Index: 0
Element type: integer type
Count of values: 1
Value:
Bounds: min: 0, max: 64, step: 0
value 0: 0
Control ID: 30
Interface: virtual mixer device
Device(client): 0, subdevice (substream) 0
Name: [Master Playback Switch]
Index: 0
Element type: boolean type
Count of values: 1
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 0
Control ID: 31
Interface: global control
Device(client): 0, subdevice (substream) 0
Name: [Front Mic Jack]
Index: 0
Element type: boolean type
Count of values: 1
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 0
Control ID: 32
Interface: global control
Device(client): 0, subdevice (substream) 0
Name: [Rear Mic Jack]
Index: 0
Element type: boolean type
Count of values: 1
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 0
Control ID: 33
Interface: global control
Device(client): 0, subdevice (substream) 0
Name: [Line Jack]
Index: 0
Element type: boolean type
Count of values: 1
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 0
Control ID: 34
Interface: global control
Device(client): 0, subdevice (substream) 0
Name: [Line Out Front Jack]
Index: 0
Element type: boolean type
Count of values: 1
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 1
Control ID: 35
Interface: global control
Device(client): 0, subdevice (substream) 0
Name: [Line Out Surround Jack]
Index: 0
Element type: boolean type
Count of values: 1
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 0
Control ID: 36
Interface: global control
Device(client): 0, subdevice (substream) 0
Name: [Line Out CLFE Jack]
Index: 0
Element type: boolean type
Count of values: 1
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 0
Control ID: 37
Interface: global control
Device(client): 0, subdevice (substream) 0
Name: [Line Out Side Jack]
Index: 0
Element type: boolean type
Count of values: 1
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 0
Control ID: 38
Interface: global control
Device(client): 0, subdevice (substream) 0
Name: [Front Headphone Jack]
Index: 0
Element type: boolean type
Count of values: 1
Value:
Bounds: min: 0, max: 1, step: 0
value 0: 0
Control ID: 39
Interface: PCM device
Device(client): 0, subdevice (substream) 0
Name: [Playback Channel Map]
Index: 0
Element type: integer type
Count of values: 8
Value:
Bounds: min: 0, max: 36, step: 0
value 0: 0
value 1: 0
value 2: 0
value 3: 0
value 4: 0
value 5: 0
value 6: 0
value 7: 0
Control ID: 40
Interface: PCM device
Device(client): 0, subdevice (substream) 0
Name: [Capture Channel Map]
Index: 0
Element type: integer type
Count of values: 2
Value:
Bounds: min: 0, max: 36, step: 0
value 0: 0
value 1: 0
Control ID: 41
Interface: PCM device
Device(client): 2, subdevice (substream) 0
Name: [Capture Channel Map]
Index: 0
Element type: integer type
Count of values: 2
Value:
Bounds: min: 0, max: 36, step: 0
value 0: 0
value 1: 0
For me it looks like the /A:1 isn't recognized. May it be possible ?
Regards
Rémy