Using Manjaro MATE (community edition) and running JACK2 audio-server, with Cadence and the integrated audio-device Intel NM10/ICH7 , there are some applications, as Telegram Desktop and Minetest, which send their sounds (notifications, music, sound of files... all their sound) via Alsoft, so I can't adjust their volumes, even if I deactivate the sound on the system.
Seems that Alsoft works as an apart audio-server
This means I can't control the volume of sound of those applications that send their sound via Alsoft. When I run the system without Jack, these sounds go via PulseAudio, so I do can adjust the volume.
I was not able to identify what exactly is Alsoft, but I suspect that it's OpenAL Soft.
So the solution that I imagine that it would work is to re-route Alsoft to PulseAudio. Do I'm right? Do anyone know how to do this?
Audio Device: Intel NM10/ICH7 Family High Definition Audio
Audio Driver: snd_hda_intel