From adbaae77d6a36725ba4235f6402e7d5bee59863f Mon Sep 17 00:00:00 2001 From: "Alexander E. Patrakov" Date: Sat, 21 May 2016 22:37:08 +0500 Subject: Disable LFE remixing by default The current LFE crossover filter removes low frequencies from the main channels and puts them into the LFE channel with the wrong amplitude. It is not known for sure what is the correct relative amplitude (acoustic measurements are required with real hardware), and changing that might introduce a new bug, "it clips the LFE channel". So just disable the feature by default until a better understanding emerges how it should work. This, essentially, returns the defaults to their state as of PulseAudio 6.0. Some more observations: - Most of available active analog speakers on the market do the necessary crossover filtering already, and HDMI receivers can be configured to do that, too, so a crossover filter in PulseAudio is harmful in these use cases. - The "laptop with a builtin subwoofer" use case requires manual configuration anyway because the default crossover frequency (120 Hz) is wrong for laptop speakers. - Finally, Windows 10 with a built-in USB audio driver does not synthesize the LFE channel given a 5.1 card and a stereo audio stream by default. Hides: https://bugs.freedesktop.org/show_bug.cgi?id=95021 Signed-off-by: Alexander E. Patrakov --- man/pulse-daemon.conf.5.xml.in | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'man') diff --git a/man/pulse-daemon.conf.5.xml.in b/man/pulse-daemon.conf.5.xml.in index 1abc94fc2..ed7715839 100644 --- a/man/pulse-daemon.conf.5.xml.in +++ b/man/pulse-daemon.conf.5.xml.in @@ -136,12 +136,12 @@ License along with PulseAudio; if not, see . channel is available as well. If no input LFE channel is available the output LFE channel will always be 0. If no output LFE channel is available the signal on the input LFE channel - will be ignored. Defaults to yes.

+ will be ignored. Defaults to no.