Convertir de Pulseaudio a ALSA

(Des)instalar

apt purge *pulse* -y
apt autoremove -y
apt install alsa-utils -y

/etc/modules-load.d/modules.conf

snd_aloop 

/etc/modprobe.d/alsa.conf

options snd_hda_intel index=0
options snd-aloop index=1 enable=1 pcm_substreams=1

~/.bash_aliases

alias audiometro='arecord -q -D hw:1,1 -V mono -f dat /dev/null'

~/.asoundrc

pcm.!default {
  type asym
  playback.pcm "LoopAndReal"
  capture.pcm "hw:0,0"
}
pcm.LoopAndReal {
  type plug
  slave.pcm mdev
  route_policy "duplicate"
}
pcm.mdev {
  type multi
  slaves.a.pcm pcm.MixReale
  slaves.a.channels 2
  slaves.b.pcm pcm.MixLoopback
  slaves.b.channels 2
  bindings.0.slave a
  bindings.0.channel 0
  bindings.1.slave a
  bindings.1.channel 1
  bindings.2.slave b
  bindings.2.channel 0
  bindings.3.slave b
  bindings.3.channel 1
}
pcm.MixReale {
  type dmix
  ipc_key 1024
  slave {
    pcm "hw:0,0"
    rate 48000
    #rate 44100
    periods 128
    period_time 0
    period_size 1024 # must be power of 2
    buffer_size 8192
  }
}
pcm.MixLoopback {
  type dmix
  ipc_key 1025
  slave {
    pcm "hw:Loopback,0,0"
    rate 48000
    #rate 44100
    periods 128
    period_time 0
    period_size 1024 # must be power of 2
    buffer_size 8192
  }
}