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Hi,
I have one sound card, with two analog inputs on my ASUS laptop. One built into the laptop, and one plugged into the 3.5mm analog audio jack (my headset). `alsamixer` suggests ALSA has found two mics - it shows 2 capture volume controls and 2 input source controls. I'm using the `pavucontrol` pulseaudio configuration tool to test what is going on with these two mics since it has a handy level meter built in. pavucontrol shows two input sources too; "Microphone" and "Analog Input". However, both are coupled to the first alsamixer mic controls. I.e. if I open pavucontrol and alsamixer I can see the set of controls for the one mic in ALSA controlling both in pulseaudio.
I have been trying to find an answer to this all day with no luck. Only found one other post describing the same thing with no resolution - https://ask.fedoraproject.org/en/questi … ulseaudio/. Anyone have any idea if there is a fix or if this is a known bug?? Here is what I think is the most relevant hardware details (you can see the 2 sets of input controls metioned in the last output).
Any advice much appreciated.
>lspci | grep Audio
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
>aplay -L
default
Playback/recording through the PulseAudio sound server
sysdefault:CARD=PCH
HDA Intel PCH, VT1802 Analog
Default Audio Device
front:CARD=PCH,DEV=0
HDA Intel PCH, VT1802 Analog
Front speakers
surround40:CARD=PCH,DEV=0
HDA Intel PCH, VT1802 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
HDA Intel PCH, VT1802 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
HDA Intel PCH, VT1802 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
HDA Intel PCH, VT1802 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
HDA Intel PCH, VT1802 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
hdmi:CARD=PCH,DEV=0
HDA Intel PCH, HDMI 0
HDMI Audio Output
>$amixer controls -c 0
numid=18,iface=MIXER,name='Master Playback Switch'
numid=17,iface=MIXER,name='Master Playback Volume'
numid=6,iface=MIXER,name='Headphone Playback Switch'
numid=5,iface=MIXER,name='Headphone Playback Volume'
numid=4,iface=MIXER,name='PCM Loopback Playback Switch'
numid=3,iface=MIXER,name='PCM Loopback Playback Volume'
numid=24,iface=MIXER,name='PCM Playback Volume'
numid=14,iface=MIXER,name='Mic Boost Volume'
numid=9,iface=MIXER,name='Capture Switch'
numid=11,iface=MIXER,name='Capture Switch',index=1
numid=8,iface=MIXER,name='Capture Volume'
numid=10,iface=MIXER,name='Capture Volume',index=1
numid=7,iface=MIXER,name='Loopback Mixing'
numid=19,iface=MIXER,name='IEC958 Playback Con Mask'
numid=20,iface=MIXER,name='IEC958 Playback Pro Mask'
numid=21,iface=MIXER,name='IEC958 Playback Default'
numid=22,iface=MIXER,name='IEC958 Playback Switch'
numid=25,iface=MIXER,name='Digital Capture Volume'
numid=16,iface=MIXER,name='Dynamic Power-Control'
numid=15,iface=MIXER,name='Independent HP'
numid=12,iface=MIXER,name='Input Source'
numid=13,iface=MIXER,name='Input Source',index=1
numid=2,iface=MIXER,name='Speaker Playback Switch'
numid=1,iface=MIXER,name='Speaker Playback Volume'
numid=23,iface=PCM,name='ELD',device=3
Last edited by 33333 (2015-06-09 15:58:10)
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