cdc687d35b
This program can be used for noise-cancelling in arbitrary audio streams. See CL/576 and CL/577 for more details. This moves the script out of my users folder and to //tools, and adds two changes: * Existing sinks will be removed & reinitialised * The sink is changed from stereo->mono (which seems to make little difference but is more reliable) * The parameter has changed from 50 to 42 because I felt like it Change-Id: Id9ff285fefd682ccc4d9f18e46b5fde9cd056aa7 Reviewed-on: https://cl.tvl.fyi/c/depot/+/578 Reviewed-by: glittershark <grfn@gws.fyi>
27 lines
1.1 KiB
Nix
27 lines
1.1 KiB
Nix
# 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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#
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# If this script is run while an NSFV sink exists, the existing sink
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# will first be removed.
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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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export PATH="${ripgrep}/bin:${pulseaudio}/bin:$PATH"
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if pacmd list-sinks | rg librnnoise_ladspa.so >/dev/null; then
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pactl unload-module module-ladspa-sink
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fi
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SINK=$(${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=''${SINK} label=noise_suppressor_mono plugin=${pkgs.nsfv}/lib/ladspa/librnnoise_ladspa.so control=42
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''
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