[pulseaudio-tickets] [Bug 94971] Please fix PulseAudio equalizer

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94971

--- Comment #16 from Rudd-O <rudd-o+freedesktop at rudd-o.com> ---
Equalizers absolutely have a valid use case, and room correction / loudness
curve compensation / dynamic range compression do not provide the same result
or serve the same goal as an equalizer does.

Room correction exists to provide a baseline "flat" frequency response (mostly)
irrespective of room and transducers; loudness curve compensation exists to
provide good perceptual bass response at low listening volumes; dynamic range
compression exists to provide good listening levels on high-dynamic range
tracks at low listening volumes.  Equalizers exist to tailor the sound to the
listener's ear aside from these other three technologies.

(An aside: it should not be our goal to philosophize about what the "proper
way" for users to use their gear should be.  If the user wants an equalizer,
give it to him.  The fact that some of us think equalizers are "not the right
thing" — for *us* — does not mean equalizers are not the right thing for users,
and does not serve as an excuse not to provide it.)

I would really like PulseAudio to incorporate an equalizer applet (like
pavucontrol) in-tree, as well as fix the plumbing to get it to work correctly. 
This is aside from the room correction software running on my receiver, which
certainly gets me to "flat" down to 19 Hz, but won't get me to the bass I would
like to have on certain tracks or during certain times of day, the bandpass I
want to listen to certain podcasts, and the treble I'd like to cut on certain
tracks.

Of course, it would also be phenomenal if PulseAudio could incorporate room
correction, loudness curve compensation, and dynamic range compression, in
particular if these technologies would work on encoded multichannel streams. 
It'd save thousands upon thousands of dollars for high-end users.  I would not
have had to buy an expensive receiver if that was the case.

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