Device appears twice in Pulseaudio and I cannot run alsamixer

GuillaumeA

12/12/22, 7:59 PM

I'm trying to increase the very low volume of my mic and I was playing with some tools.

When I run pulseaudio, I cranked the volume of the mic up to 153% without noticeable effect on the recorded volumed. However, I noticed two devices

which are basically the same. This behaviour is the same in the output devices tab. So I tried to look at alsamixer if I can see this too, but I ran into this error

ALSA lib simple_none.c:1544:(simple_add1) helem (MIXER,'Master Playback Switch',0,1,0) appears twice or more

cannot load mixer controls: Invalid argument

which seem to confirm the presence of the two same devices in pulseaudio. This is also confirmed by

$> amixer -c0 controls                       
numid=48,iface=CARD,name='Front Headphone Jack'
numid=30,iface=CARD,name='Line Jack'
numid=33,iface=CARD,name='Line Out CLFE Jack'
numid=31,iface=CARD,name='Line Out Front Jack'
numid=32,iface=CARD,name='Line Out Surround Jack'
numid=29,iface=CARD,name='Mic Jack'
numid=47,iface=CARD,name='Mic Jack',index=1
numid=34,iface=CARD,name='SPDIF Phantom Jack'
numid=28,iface=MIXER,name='Master Playback Switch'
numid=40,iface=MIXER,name='Master Playback Switch',device=1
....

My question is then, how to remove those duplicate devices ? and if someone has any clue on how to increase the mic sound level (I read almost every forums, posts etc without finding a valid solution)

0 + 0

sound

pulseaudio

microphone

alsa

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Device appears twice in Pulseaudio and I cannot run alsamixer

TH: อุปกรณ์ปรากฏขึ้นสองครั้งใน Pulseaudio และฉันไม่สามารถเรียกใช้อัลซามิกเซอร์ได้

RO: Dispozitivul apare de două ori în Pulseaudio și nu pot rula alsamixer

RU: Устройство появляется дважды в Pulseaudio, и я не могу запустить alsamixer

VI: Thiết bị xuất hiện hai lần trong Pulseaudio và tôi không thể chạy alsamixer

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