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Following the advice of @Takkat (Apply LADSPA plugin to input (microphone)), I tried to apply a plugin (SC4 Mono) to a newly created sink:

pacmd load-module module-ladspa-sink sink_name=ladspa-sink master=alsa_output.pci-0000_00_10.1.analog-stereo plugin=sc4m_1916 label=SC4mono control=0,100,400,0,0,3.25,0,0,0

The name of the sink was checked with the following command:

pacmd list-sinks

The name of the plugin was checked in the the folder:

/usr/lib/ladspa/

But running that command in the terminal returns:

Module load failed.

I use the default settings for the SC4 Mono plugin when loaded with Audacity for my command. In the end I would like to apply the plugin SC4 Mono to the Microphone Input of my soundcard, so that other programs receive the altered signal.

zelyev
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1 Answers1

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There where two errors in my command:

Original command:

pacmd load-module module-ladspa-sink sink_name=ladspa-sink master=alsa_output.pci-0000_00_10.1.analog-stereo plugin=sc4m_1916 label=SC4mono control=0,100,400,0,0,3.25,0,0,0
Module load failed.

Label changed to sc4m:

pacmd load-module module-ladspa-sink sink_name=ladspa-sink master=alsa_output.pci-0000_00_10.1.analog-stereo plugin=sc4m_1916 label=sc4m control=0,100,400,0,0,3.25,0,0,0
Module load failed.

Control values changed:

pacmd load-module module-ladspa-sink sink_name=ladspa-sink master=alsa_output.pci-0000_00_10.1.analog-stereo plugin=sc4m_1916 label=SC4mono control=1,1.5,401,-30,20,5,12
Module load failed.

Label and control values changed – success:

pacmd load-module module-ladspa-sink sink_name=ladspa-sink master=alsa_output.pci-0000_00_10.1.analog-stereo plugin=sc4m_1916 label=sc4m control=1,1.5,401,-30,20,5,12

Change summary:

label=sc4m
control=1,1.5,401,-30,20,5,12

The correct labels for the steve harris plugins (http://plugin.org.uk/ladspa-swh/docs/ladspa-swh.html) seem to be the first part within the parenthesis next to the plugin name.

The control values must also be carefully chosen.

zelyev
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