The mic is visible in "PulseAudio volume control". It is not muted and volume is at 100%. I can see it picks sounds. It is also visible in arecord:
$ arecord -l | tail -n 3
card 3: Microphone [Trust GXT 232 Microphone], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
$ arecord -L | tail -n 39
sysdefault:CARD=Microphone
Trust GXT 232 Microphone, USB Audio
Default Audio Device
front:CARD=Microphone,DEV=0
Trust GXT 232 Microphone, USB Audio
Front speakers
surround21:CARD=Microphone,DEV=0
Trust GXT 232 Microphone, USB Audio
2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=Microphone,DEV=0
Trust GXT 232 Microphone, USB Audio
4.0 Surround output to Front and Rear speakers
surround41:CARD=Microphone,DEV=0
Trust GXT 232 Microphone, USB Audio
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Microphone,DEV=0
Trust GXT 232 Microphone, USB Audio
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Microphone,DEV=0
Trust GXT 232 Microphone, USB Audio
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Microphone,DEV=0
Trust GXT 232 Microphone, USB Audio
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Microphone,DEV=0
Trust GXT 232 Microphone, USB Audio
IEC958 (S/PDIF) Digital Audio Output
dmix:CARD=Microphone,DEV=0
Trust GXT 232 Microphone, USB Audio
Direct sample mixing device
dsnoop:CARD=Microphone,DEV=0
Trust GXT 232 Microphone, USB Audio
Direct sample snooping device
hw:CARD=Microphone,DEV=0
Trust GXT 232 Microphone, USB Audio
Direct hardware device without any conversions
plughw:CARD=Microphone,DEV=0
Trust GXT 232 Microphone, USB Audio
Hardware device with all software conversions
The mic is not available for selection in Audacity (I tried all options, launched Audacity after mic was connected). It works oob in Windows 10 in Audacity.
I am using Audacity 2.1.2, PulseAudio 8 (Kubuntu 16.04).
amixer:
Simple mixer control 'Master',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 64
Mono: Playback 58 [91%] [-6.00dB] [on]
Simple mixer control 'Headphone',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 64
Mono:
Front Left: Playback 64 [100%] [0.00dB] [on]
Front Right: Playback 64 [100%] [0.00dB] [on]
Simple mixer control 'PCM',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 255
Mono:
Front Left: Playback 255 [100%] [0.00dB]
Front Right: Playback 255 [100%] [0.00dB]
Simple mixer control 'Front',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 64
Mono:
Front Left: Playback 64 [100%] [0.00dB] [on]
Front Right: Playback 64 [100%] [0.00dB] [on]
Simple mixer control 'Front Mic',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 0 [0%] [-34.50dB] [on]
Front Right: Playback 0 [0%] [-34.50dB] [on]
Simple mixer control 'Front Mic Boost',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 3
Front Left: 2 [67%] [20.00dB]
Front Right: 2 [67%] [20.00dB]
Simple mixer control 'Surround',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 64
Mono:
Front Left: Playback 0 [0%] [-64.00dB] [off]
Front Right: Playback 0 [0%] [-64.00dB] [off]
Simple mixer control 'Center',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 64
Mono: Playback 0 [0%] [-64.00dB] [off]
Simple mixer control 'LFE',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 64
Mono: Playback 0 [0%] [-64.00dB] [off]
Simple mixer control 'Line',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 0 [0%] [-34.50dB] [on]
Front Right: Playback 0 [0%] [-34.50dB] [on]
Simple mixer control 'Line Boost',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 3
Front Left: 0 [0%] [0.00dB]
Front Right: 0 [0%] [0.00dB]
Simple mixer control 'Capture',0
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right
Limits: Capture 0 - 46
Front Left: Capture 46 [100%] [30.00dB] [on]
Front Right: Capture 46 [100%] [30.00dB] [on]
Simple mixer control 'Capture',1
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right
Limits: Capture 0 - 46
Front Left: Capture 0 [0%] [-16.00dB] [off]
Front Right: Capture 0 [0%] [-16.00dB] [off]
Simple mixer control 'Auto-Mute Mode',0
Capabilities: enum
Items: 'Disabled' 'Enabled'
Item0: 'Disabled'
Simple mixer control 'Channel Mode',0
Capabilities: enum
Items: '2ch' '4ch' '6ch'
Item0: '2ch'
Simple mixer control 'Digital',0
Capabilities: cvolume
Capture channels: Front Left - Front Right
Limits: Capture 0 - 120
Front Left: Capture 60 [50%] [0.00dB]
Front Right: Capture 60 [50%] [0.00dB]
Simple mixer control 'Input Source',0
Capabilities: cenum
Items: 'Front Mic' 'Rear Mic' 'Line'
Item0: 'Line'
Simple mixer control 'Input Source',1
Capabilities: cenum
Items: 'Front Mic' 'Rear Mic' 'Line'
Item0: 'Line'
Simple mixer control 'Loopback Mixing',0
Capabilities: enum
Items: 'Disabled' 'Enabled'
Item0: 'Enabled'
Simple mixer control 'Rear Mic',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 0 [0%] [-34.50dB] [on]
Front Right: Playback 0 [0%] [-34.50dB] [on]
Simple mixer control 'Rear Mic Boost',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 3
Front Left: 0 [0%] [0.00dB]
Front Right: 0 [0%] [0.00dB]
Not sure if the USB mic is there. I tried few other parameters where it seems to show up at the end.
$ amixer controls
:
numid=35,iface=CARD,name='Front Headphone Jack'
numid=31,iface=CARD,name='Front Mic Jack'
numid=33,iface=CARD,name='Line Jack'
numid=34,iface=CARD,name='Line Out Jack'
numid=32,iface=CARD,name='Rear Mic Jack'
numid=30,iface=MIXER,name='Master Playback Switch'
numid=29,iface=MIXER,name='Master Playback Volume'
numid=11,iface=MIXER,name='Headphone Playback Switch'
numid=10,iface=MIXER,name='Headphone Playback Volume'
numid=39,iface=MIXER,name='PCM Playback Volume'
numid=26,iface=MIXER,name='Front Mic Boost Volume'
numid=14,iface=MIXER,name='Front Mic Playback Switch'
numid=13,iface=MIXER,name='Front Mic Playback Volume'
numid=3,iface=MIXER,name='Front Playback Switch'
numid=2,iface=MIXER,name='Front Playback Volume'
numid=5,iface=MIXER,name='Surround Playback Switch'
numid=4,iface=MIXER,name='Surround Playback Volume'
numid=8,iface=MIXER,name='Center Playback Switch'
numid=6,iface=MIXER,name='Center Playback Volume'
numid=9,iface=MIXER,name='LFE Playback Switch'
numid=7,iface=MIXER,name='LFE Playback Volume'
numid=28,iface=MIXER,name='Line Boost Volume'
numid=18,iface=MIXER,name='Line Playback Switch'
numid=17,iface=MIXER,name='Line Playback Volume'
numid=23,iface=MIXER,name='Capture Switch'
numid=25,iface=MIXER,name='Capture Switch',index=1
numid=22,iface=MIXER,name='Capture Volume'
numid=24,iface=MIXER,name='Capture Volume',index=1
numid=12,iface=MIXER,name='Loopback Mixing'
numid=19,iface=MIXER,name='Auto-Mute Mode'
numid=1,iface=MIXER,name='Channel Mode'
numid=40,iface=MIXER,name='Digital Capture Volume'
numid=20,iface=MIXER,name='Input Source'
numid=21,iface=MIXER,name='Input Source',index=1
numid=27,iface=MIXER,name='Rear Mic Boost Volume'
numid=16,iface=MIXER,name='Rear Mic Playback Switch'
numid=15,iface=MIXER,name='Rear Mic Playback Volume'
numid=37,iface=PCM,name='Capture Channel Map'
numid=36,iface=PCM,name='Playback Channel Map'
numid=38,iface=PCM,name='Capture Channel Map',device=2
$ amixer contents
:
numid=35,iface=CARD,name='Front Headphone Jack'
; type=BOOLEAN,access=r-------,values=1
: values=on
numid=31,iface=CARD,name='Front Mic Jack'
; type=BOOLEAN,access=r-------,values=1
: values=on
numid=33,iface=CARD,name='Line Jack'
; type=BOOLEAN,access=r-------,values=1
: values=off
numid=34,iface=CARD,name='Line Out Jack'
; type=BOOLEAN,access=r-------,values=1
: values=off
numid=32,iface=CARD,name='Rear Mic Jack'
; type=BOOLEAN,access=r-------,values=1
: values=off
numid=30,iface=MIXER,name='Master Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=29,iface=MIXER,name='Master Playback Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=64,step=0
: values=58
| dBscale-min=-64.00dB,step=1.00dB,mute=0
numid=11,iface=MIXER,name='Headphone Playback Switch'
; type=BOOLEAN,access=rw------,values=2
: values=on,on
numid=10,iface=MIXER,name='Headphone Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=64,step=0
: values=64,64
| dBscale-min=-64.00dB,step=1.00dB,mute=0
numid=39,iface=MIXER,name='PCM Playback Volume'
; type=INTEGER,access=rw---RW-,values=2,min=0,max=255,step=0
: values=255,255
| dBscale-min=-51.00dB,step=0.20dB,mute=0
numid=26,iface=MIXER,name='Front Mic Boost Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=3,step=0
: values=2,2
| dBscale-min=0.00dB,step=10.00dB,mute=0
numid=14,iface=MIXER,name='Front Mic Playback Switch'
; type=BOOLEAN,access=rw------,values=2
: values=on,on
numid=13,iface=MIXER,name='Front Mic Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=31,step=0
: values=0,0
| dBscale-min=-34.50dB,step=1.50dB,mute=0
numid=3,iface=MIXER,name='Front Playback Switch'
; type=BOOLEAN,access=rw------,values=2
: values=on,on
numid=2,iface=MIXER,name='Front Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=64,step=0
: values=64,64
| dBscale-min=-64.00dB,step=1.00dB,mute=0
numid=5,iface=MIXER,name='Surround Playback Switch'
; type=BOOLEAN,access=rw------,values=2
: values=off,off
numid=4,iface=MIXER,name='Surround Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=64,step=0
: values=0,0
| dBscale-min=-64.00dB,step=1.00dB,mute=0
numid=8,iface=MIXER,name='Center Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=6,iface=MIXER,name='Center Playback Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=64,step=0
: values=0
| dBscale-min=-64.00dB,step=1.00dB,mute=0
numid=9,iface=MIXER,name='LFE Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=7,iface=MIXER,name='LFE Playback Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=64,step=0
: values=0
| dBscale-min=-64.00dB,step=1.00dB,mute=0
numid=28,iface=MIXER,name='Line Boost Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=3,step=0
: values=0,0
| dBscale-min=0.00dB,step=10.00dB,mute=0
numid=18,iface=MIXER,name='Line Playback Switch'
; type=BOOLEAN,access=rw------,values=2
: values=on,on
numid=17,iface=MIXER,name='Line Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=31,step=0
: values=0,0
| dBscale-min=-34.50dB,step=1.50dB,mute=0
numid=23,iface=MIXER,name='Capture Switch'
; type=BOOLEAN,access=rw------,values=2
: values=on,on
numid=25,iface=MIXER,name='Capture Switch',index=1
; type=BOOLEAN,access=rw------,values=2
: values=off,off
numid=22,iface=MIXER,name='Capture Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=46,step=0
: values=46,46
| dBscale-min=-16.00dB,step=1.00dB,mute=0
numid=24,iface=MIXER,name='Capture Volume',index=1
; type=INTEGER,access=rw---R--,values=2,min=0,max=46,step=0
: values=0,0
| dBscale-min=-16.00dB,step=1.00dB,mute=0
numid=12,iface=MIXER,name='Loopback Mixing'
; type=ENUMERATED,access=rw------,values=1,items=2
; Item #0 'Disabled'
; Item #1 'Enabled'
: values=1
numid=19,iface=MIXER,name='Auto-Mute Mode'
; type=ENUMERATED,access=rw------,values=1,items=2
; Item #0 'Disabled'
; Item #1 'Enabled'
: values=0
numid=1,iface=MIXER,name='Channel Mode'
; type=ENUMERATED,access=rw------,values=1,items=3
; Item #0 '2ch'
; Item #1 '4ch'
; Item #2 '6ch'
: values=0
numid=40,iface=MIXER,name='Digital Capture Volume'
; type=INTEGER,access=rw---RW-,values=2,min=0,max=120,step=0
: values=60,60
| dBscale-min=-30.00dB,step=0.50dB,mute=0
numid=20,iface=MIXER,name='Input Source'
; type=ENUMERATED,access=rw------,values=1,items=3
; Item #0 'Front Mic'
; Item #1 'Rear Mic'
; Item #2 'Line'
: values=2
numid=21,iface=MIXER,name='Input Source',index=1
; type=ENUMERATED,access=rw------,values=1,items=3
; Item #0 'Front Mic'
; Item #1 'Rear Mic'
; Item #2 'Line'
: values=2
numid=27,iface=MIXER,name='Rear Mic Boost Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=3,step=0
: values=0,0
| dBscale-min=0.00dB,step=10.00dB,mute=0
numid=16,iface=MIXER,name='Rear Mic Playback Switch'
; type=BOOLEAN,access=rw------,values=2
: values=on,on
numid=15,iface=MIXER,name='Rear Mic Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=31,step=0
: values=0,0
| dBscale-min=-34.50dB,step=1.50dB,mute=0
numid=37,iface=PCM,name='Capture Channel Map'
; type=INTEGER,access=r----R--,values=2,min=0,max=36,step=0
: values=0,0
| container
| chmap-fixed=FL,FR
numid=36,iface=PCM,name='Playback Channel Map'
; type=INTEGER,access=r----R--,values=2,min=0,max=36,step=0
: values=0,0
| container
| chmap-fixed=FL,FR
numid=38,iface=PCM,name='Capture Channel Map',device=2
; type=INTEGER,access=r----R--,values=2,min=0,max=36,step=0
: values=0,0
| container
| chmap-fixed=FL,FR