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I'm trying to remove noise from a mic.

pacmd list-sources shows analog-input-mic and analog-input-internal-mic However when i run pacat it only allows a device-spec name: <alsa_input.pci-0000_00_1b.0.analog-stereo> How do I get the granularity of a port.

The command I'm trying to stitch together is pacat --format=s16le --channels=2 -r -d $input --latency=1msec|sox -b 16 -e signed -c 2 -r 44100 -t raw - -b 16 -e signed -c 2 -r 44100 -t raw - noisered noise.prof 0.2|pacat -p -d $output --latency=1msec&

Why are most of the examples I'm seeing online, specifying the entire card and not CARD-index-name:PORT. I generally find myself fiddling with ALSA or pavucontrol to set the specific PORT i need?

I did further googling and found this: Pulseaudio Profiles Apparently you can set the cards 'active profile' but this is global and will affect all apps.In my case, I have active profile: <output:analog-stereo+input:analog-stereo> so I can't change to analog-input-mic: without creating a profile AND it'll affect any further apps that I start. Also found this PulseAudio Architecture Overview A card represents a physical audio device It also has a single active card profile A card profile represents an opaque configuration set for a card. Only one card profile of a card may be active at the same time. The user can switch the active card profile at any time.

The user can switch the active device port of a source or sink at any time. but when I do alsamixer -c 0 and change the Input Source it doesn't affect pulseaudio in any way. Pulseaudio continues to show active port: <analog-input-mic> instead of analog-input-internal-mic (using pacmd list)

  • currently I'm doing: pactl set-source-port alsa_input.pci-0000_00_1b.0.analog-stereo analog-input-mic to switch to analog-input-mic – putty Nov 12 '18 at 6:47

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