[Bug 284435] [pcm] no /dev/dspX.vpY created when playing sound.

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=284435

            Bug ID: 284435
           Summary: [pcm] no /dev/dspX.vpY created when playing sound.
           Product: Base System
           Version: 14.1-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: misc
          Assignee: bugs@FreeBSD.org
          Reporter: lucretiathandekadvjew0at@gmail.com

Up to my knowledge, sound with devfs are creating new entries in /dev when a
pid requests a sound input / output.
These entries are special character file in this form : /dev/dsp0.vp0 for
playing sound and /dev/dsp0.vr0 for recording sound.
I observe these systems activate correctly in 12.2, in 13.4 but in 14.1-STABLE,
this didn't happen.

I have only investigated by launching mpv or mplayer.
The 12.2 os and 14.1-STABLE ( n267834-e1f5c22be431 ) are in the same machine.
The 13.4 is in a portable pc.
The direct outcome is that I couldn't use mixer to change only one process's
volume.

Hope it was clear, I couldn't any explanation anywhere, so I file this here.

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