>> >> Hui and I have been working on some LFE filter patches lately, and this >> is our first draft for review/feedback. >> >> First, I have greedily stolen the math from CRAS, because CRAS is BSD and >> as I understand we don't have a problem with merging more liberal licenses. >> >> The LFE filter is implemented in the resampler, which means it is done for >> every sink-input rather than every sink - this might mean some additional >> CPU processing if many different streams play back at the same time, but >> putting it on the sink side would disable the possibility to mix a 2.0 stream >> with a 2.1 stream. >> >> The rewind part is very drafty and untested, and I'm not sure I choose the >> best design here. But at least this is something that could act as base for >> discussion. > > > Sorry for a possibly-stupid question, but... > > Which part of PulseAudio is supposed to disable the effect if the user plugs headphones in? Or is it yet to be written? > As plug of headphone won't change profile , the headphone just get signal without any bass , this is similar to plug headphone when playing 5.1 did pulseaudio automatically downmix 5.1 to stereo ?