Hi,
I use PCP3.2 and a justboom amp HAT, it runs very fine.
I managed to get it working with both equalizer and mono re-mapping
thanks to the PCP GUI and to a poster on this forum.
I really don't understand how ALSA works and it's been like that for
ages.

I need now to inject sound directly from the OS, with something like
aplay, on top of what squeezelite is playing. This comes in addition to
the mono/equal setup.
I don't want to stop squeezelite to be able to play the sound, in fact I
would like to change nothing at LMS level (volume, pause...) because the
soundbite I need to inject is so short.
What I would like to do is fade out or reduce the audio volume for
squeezelite, play the soundbite a bit louder on top of it, then return
the squeezelite audio output to normal volume.

Is it possible? How?
Thanks in advance.
PS: asound.conf
Code:
--------------------
    # default - Generated by piCorePlayer
  pcm.!default {
  type plug
  slave.pcm "hw:0,0"
  }
  
  #---ALSA EQ Below--------
  ctl.equal {
  type equal;
  controls "/home/tc/.alsaequal.bin"
  library "/usr/local/lib/ladspa/caps.so"
  }
  
  pcm.plugequal {
  type equal;
  slave.pcm "plughw:1,0";
  controls "/home/tc/.alsaequal.bin"
  library "/usr/local/lib/ladspa/caps.so"
  }
  
  pcm.equal {
  type plug;
  slave.pcm plugequal;
  # Mono downmix + eq
        ttable {
                0.1 1
                0.0 1
                1.0 1
                1.1 1
        }
  }
--------------------



3 SB 3 • Libratone Loop, Zipp Mini • iPeng (iPhone + iPad) • LMS 7.9
(linux) with plugins: CD Player, WaveInput, Triode's BBC iPlayer by bpa
• IRBlaster by Gwendesign (Felix) • Server Power Control by Gordon
Harris • Smart Mix, Music Walk With Me, What Was That Tune? by Michael
Herger • PowerSave by Jason Holtzapple • Song Info, Song Lyrics by
Erland Isaksson • AirPlay Bridge by philippe_44 • WeatherTime by Martin
Rehfeld • Auto Dim Display, SaverSwitcher, ContextMenu by Peter Watkins.
------------------------------------------------------------------------
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