If you read LADSPA specification, you'll see that in a LADSPA plugin
there are functions that are called once per plugin lifecycle. You can
insert into those functions fprintf(stderr, ...) calls with diagnostic
messages to make sure the plugin is indeed instantiated/used.
For that matter, with big enough samples buffer you can insert the same
kind of fprintf statements into the 'run' function.
Also, LADSPA plugins should be listed in the PulseAudio configuration
file. I did manage to run a pretty sophisticated LADSPA plugin of my own
under PulseAudio several years ago; don't have PulseAudio configuration
file at the moment at hand right now, maybe I'll find it later.
--Sergei.
On 09/06/2024 1:07, Doron Behar wrote:
Sorry for the late reply :) (I'm not used to mailing lists)
On Mon, Jun 03, 2024 at 09:19:50PM -0700, Sean Greenslade wrote:
On Mon, Jun 03, 2024 at 06:17:59PM +0300, Doron Behar wrote:
I found this program I'd like to use:
https://github.com/pulseaudio-equalizer-ladspa/equalizer
I managed to compile and run it, but I don't hear it makes a difference
in the sound. Do I need to enable the `module-ladspa-sink` module? Link:
https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Modules/#module-ladspa-sink
What makes it difficult for me to figure this out myself, is the
[LADSPA](http://www.ladspa.org/) link, which seems to general, because
this group develop many projects, or which I'm not sure which I should
compile as a pulseaudio plugin (some of which are available in my
distribution.
Thanks for any help in advance.
What distro of Linux are you running?
Eyeballing the Arch package for this equalizer, it looks like it needs
the swh-plugins package for the actual LADSPA plugin itself. It might be
named differently on your distro.
So I'm using NixOS and our `ladspaPlugins` package distributes the files
distributed by Arch Linux' `swh-plugins` package.
You shouldn't need to manually load any modules in pulse; this equalizer
script seems to do all the module loading automagically.
OK, sounds promising. I'm still a bit confused how it won't output any
error if it doesn't find these plugins at all. Perhaps I'll continue to
discuss this with upstream at:
https://github.com/pulseaudio-equalizer-ladspa/equalizer/issues/58
I will reply again to this thread if I'll learn something new after
discussing there.
Thanks anyway.
