19 lines
826 B
Nix
19 lines
826 B
Nix
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# Configures a running Pulseaudio instance with an LADSP filter that
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# creates a noise-cancelling sink.
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#
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# This can be used to, for example, cancel noise from an incoming
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# video conferencing audio stream.
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#
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# There are some caveats, for example this will not distinguish
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# between noise from different participants and I have no idea what
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# happens if the default sink goes away.
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{ pkgs, ... }:
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let
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inherit (pkgs) ripgrep pulseaudio nsfv;
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in pkgs.writeShellScriptBin "nsfv-setup" ''
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SINK=$(${pulseaudio}/bin/pacmd info | ${ripgrep}/bin/rg -r '$1' '^Default sink name: (.*)$')
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echo "Setting up NSFV filtering to sink ''${SINK}"
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${pulseaudio}/bin/pacmd load-module module-ladspa-sink sink_name=NSFV sink_master=''${SINK} label=noise_suppressor_stereo plugin=${pkgs.nsfv}/lib/ladspa/librnnoise_ladspa.so control=50
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''
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