No, I actually didn't try the equalizer from git as the solution with null sink worked ok. However I faced some troubles with it during further development: 1. Sometimes when I start GStreamer app with source in monitor of null sink and sink in PA's alsa sink through equalizer plugin it plays as if with the wrong samplerate is set i.e. sounds are pitched down and are very distorted. I can avoid this only by killing and restarting my equalizer application. 2. Several seconds after equalizer application started there're some clicks and drops in output. I've read about glitch-free algorithm which can lead to these problems but I've also read that they were fixed. Tanu, can some of these problems be due to buffering issues you wrote? Or perhaps there're some settings to fix them besides using equalizer from git (that's the possible way for me but I still would like to make it as GStreamer app if problems above can be solved somehow).