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I want to loopback the sink.monitor of a null-sink into my soundcard speakers but It doesn't work: no sound coming out from the speakers. The null-sink (appoutput) is fed from VLC (this works, I can see the sliders move in pavucontrol). (I'm using Ubuntu 18.04).

Here is the code I have:

pactl load-module module-null-sink sink_name=appoutput
PULSE_SINK=appoutput vlc& #start VLC and direct ouput onto the sink created 
#This is what doesn't work ?
pactl load-module module-loopback  source=appoutput.source sink=alsa_output.pci-0000_00_1b.0.analog-stereo

A partial listing of pactl list sinks is:

Sink #0
    State: IDLE
    Name: alsa_output.pci-0000_00_1b.0.analog-stereo
    Description: Built-in Audio Analogue Stereo
    Driver: module-alsa-card.c
    Sample Specification: s16le 2ch 44100Hz
    Channel Map: front-left,front-right
    Owner Module: 7
    Mute: no

Many thanks.

mauricebis
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1 Answers1

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Yes indeed..., the command pactl load-module module-loopback source=appoutput.source sink=alsa_output.pci-0000_00_1b.0.analog-stereo

should be after substituting appoutput.monitor for appoutput.source:

pactl load-module module-loopback source=appoutput.monitor sink=alsa_output.pci-0000_00_1b.0.analog-stereo

and then the loopback module doesn't fail to initialize.

mauricebis
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