Хочу что бы был звук 5.1 и резались частоты для сабвуфера.
Сейчас 5.1 отлично работает, но саб работает как динамик. Без среза частот.
/etc/pulse/daemon.conf

; daemonize = no
; fail = yes
; allow-module-loading = yes
; allow-exit = yes
; use-pid-file = yes
; system-instance = no
; local-server-type = user
; enable-shm = yes
; enable-memfd = yes
; shm-size-bytes = 0 # setting this 0 will use the system-default, usually 64 MiB
; lock-memory = no
; cpu-limit = no

; high-priority = yes
; nice-level = -11

; realtime-scheduling = yes
; realtime-priority = 5

; exit-idle-time = 20
; scache-idle-time = 20

; dl-search-path = (depends on architecture)

; load-default-script-file = yes
; default-script-file = /etc/pulse/default.pa

; log-target = auto
; log-level = notice
; log-meta = no
; log-time = no
; log-backtrace = 0

; resample-method = soxr-vhq
enable-remixing = yes
enable-lfe-remixing = yes
lfe-crossover-freq = 120

flat-volumes = no
; flat-volumes = yes

; rlimit-fsize = -1
; rlimit-data = -1
; rlimit-stack = -1
; rlimit-core = -1
; rlimit-as = -1
; rlimit-rss = -1
; rlimit-nproc = -1
; rlimit-nofile = 256
; rlimit-memlock = -1
; rlimit-locks = -1
; rlimit-sigpending = -1
; rlimit-msgqueue = -1
; rlimit-nice = 31
; rlimit-rtprio = 9
; rlimit-rttime = 200000

default-sample-format = s16le
; default-sample-rate = 44100
; alternate-sample-rate = 48000
default-sample-channels = 6
default-channel-map = front-left,front-right,rear-left,rear-right,front-center,lfe

; default-fragments = 4
; default-fragment-size-msec = 25

; enable-deferred-volume = yes
; deferred-volume-safety-margin-usec = 8000
; deferred-volume-extra-delay-usec = 0

/etc/pulse/default.pa

load-module module-alsa-sink channels=6 device=surround51

### Automatically load driver modules depending on the hardware available
#.ifexists module-udev-detect.so
#load-module module-udev-detect
#.else
### Use the static hardware detection module (for systems that lack udev support)
#load-module module-detect
#.endif


Пытался разрулить это через ALSA
/etc/asound.conf

# Use PulseAudio by default
pcm.!default {
  type pulse
  fallback "sysdefault"
  hint {
    show on
    description "Default ALSA Output (currently PulseAudio Sound Server)"
  }
}

ctl.!default {
  type pulse
  fallback "sysdefault"
}

# vim:set ft=alsaconf:
pcm.upmix_20to51 {
    type plug
    slave.pcm lowpass_21to21
    slave.channels 3
    ttable {
        0.0     1       # left channel
        1.1     1       # right channel
        0.2     0.5     # mix left and right ...
        1.2     0.5     # ... channel for subwoofer
    }
  hint {
    show on
    description "BASS"
  }
}
pcm.lowpass_21to21 {
    type ladspa
    slave.pcm upmix_21to51
    path "/usr/lib/ladspa"
    channels 3
    plugins {
        0 {
            id 1098 # Identity (Audio) (1098/identity_audio)
            policy duplicate
            input.bindings.0 "Input";
            output.bindings.0 "Output";
        }
        1 {
            id 1672 # 4 Pole Low-Pass Filter with Resonance (FCRCIA) (1672/lp4pole_fcrcia_oa)
            policy none
            input.bindings.2 "Input";
            output.bindings.2 "Output";
            input {
                controls [ 100 2 ]
            }
        }
    }
}

pcm.upmix_21to51 {
    type plug
    slave.pcm surround51
    slave.channels 6
    ttable {
        0.0     1       # front left
        1.1     1       # front right
        0.2     1       # rear left
        1.3     1       # rear right
        0.4     0.5     # center
        1.4     0.5     # center
        2.5     1       # subwoofer
    }
}

И оно играет так как нужно, но если прописать в pulseaudio

load-module module-alsa-sink device=upmix_20to51

То при запуске pulseaudio выдает

: [pulseaudio] alsa-util.c: Trying upmix_20to51 with SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open upmix_20to51
I: [pulseaudio] (alsa-lib)pcm_params.c: Slave PCM not usable
D: [pulseaudio] alsa-util.c: snd_pcm_hw_params_any() failed: Недопустимый аргумент
D: [pulseaudio] alsa-util.c: Trying upmix_20to51 without SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open upmix_20to51
I: [pulseaudio] (alsa-lib)pcm_params.c: Slave PCM not usable
D: [pulseaudio] alsa-util.c: snd_pcm_hw_params_any() failed: Недопустимый аргумент
D: [pulseaudio] alsa-util.c: Trying plug:upmix_20to51 with SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open plug:upmix_20to51
I: [pulseaudio] (alsa-lib)pcm_params.c: Slave PCM not usable
I: [pulseaudio] (alsa-lib)pcm_params.c: Slave PCM not usable
D: [pulseaudio] alsa-util.c: snd_pcm_hw_params_any() failed: Недопустимый аргумент
D: [pulseaudio] alsa-util.c: Trying plug:upmix_20to51 without SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open plug:upmix_20to51
I: [pulseaudio] (alsa-lib)pcm_params.c: Slave PCM not usable
I: [pulseaudio] (alsa-lib)pcm_params.c: Slave PCM not usable
D: [pulseaudio] alsa-util.c: snd_pcm_hw_params_any() failed: Недопустимый аргумент
I: [pulseaudio] alsa-util.c: Failed to set hardware parameters on plug:upmix_20to51: Недопустимый аргумент
E: [pulseaudio] module.c: Failed to load module "module-alsa-sink" (argument: "device=upmix_20to51"): initialization failed.
E: [pulseaudio] main.c: Module load failed.
E: [pulseaudio] main.c: Не удалось инициализировать демон.


Соответвенно не работает.
Подскажите куда копать для того что бы pulseaudio сама разруливала срез частот или как её заставить работать с upmix_20to51?