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Old 09-04-2015, 07:44 AM   #1
LQ Newbie
Registered: Aug 2015
Distribution: Ubuntu 14.05
Posts: 4

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Pulseaudio crackling with LADSPA plugins

So I load plugins in Pulseaudio to listen through them as a virtual device, but the more plugins I add, the more I experience crackling.
I'm loading this:
pacmd load-module module-ladspa-sink sink_name=reverb master=alsa_output.pci-0000_04_04.0.analog-stereo plugin=tap_reverb label=tap_reverb control=300,-10,0,1,1,1,1,26
pacmd load-module module-ladspa-sink sink_name=crossfeed master=reverb plugin=bs2b label=bs2b control=700,4.5
pacmd load-module module-ladspa-sink sink_name=ladspa_output.mbeq_1197.mbeq master=crossfeed plugin=mbeq_1197 label=mbeq control=7.5,3.5,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0
I set the 3rd device as system default, and the crackling is really, really bad. It is basically impossible to listen through, and it's only 3 plugins.
If I remove the equalizer plugin it's reduced but it is still noticeable.
I've tried a lot of the options that are suggested for pulseaudio crackling but none has had any effect on the sound whatsoever.
What I'm trying to do is achieve system wide listening with binaural sound, reverb and bass boost.

Last edited by mixor; 09-04-2015 at 07:47 AM.
Old 09-05-2015, 08:04 AM   #2
LQ Newbie
Registered: Aug 2015
Distribution: Ubuntu 14.05
Posts: 4

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I fixed it, no idea why but setting the volume of everything to max in the alsamixer cleared the crackling even with a low volume setting from the pulseaudio volume control.
I'm guessing that something somewere tried to boost the volume by software and failed, or something like that. It's really weird.


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