[Bug 291743] Java programs cannot play sound

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291743

            Bug ID: 291743
           Summary: Java programs cannot play sound
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: java@FreeBSD.org
          Reporter: mi@FreeBSD.org
 Attachment #266295 text/plain
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Created attachment 266295
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=266295&action=edit
The test program

On different systems, using different JDK-versions -- from 8 to 23 -- the
symptoms are the same: javax.sound.sampled.AudioSystem.getMixerInfo() returns
an empty list despite multiple audio systems listed in /dev/sndstat -- and the
audio, indeed, working for applications like Firefox and MPlayer.

Running the attached simple program under ktrace, I see attempts to open
non-existent Linux-type devices like /dev/snd/controlC* and /dev/aloadC*, which
do not exist -- but not the actual /dev/dsp*!

For JDKs above 8, you can just use jshell -- without compiling my test-program:

    % env JAVA_VERSION=22 jshell --show-version
    jshell 22.0.2
    |  Welcome to JShell -- Version 22.0.2
    |  For an introduction type: /help intro

    jshell> javax.sound.sampled.AudioSystem.getMixerInfo();
    $1 ==> Mixer$Info[0] {  }

Many years ago, when I was using the games/jin port, this was not a problem --
the game was playing its sounds at the right moments.

(P.S. An attempt to reach the ports' maintainers directly bounced: "... was
unable to be delivered to the list because you are not a list subscriber",
which is a problem in its own right.)

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