minecraft will do audio if openal is installed. The problem up until Brad's 1.20.1 update is that minecraft would crash on startup about 50% of the time. So you'd start it again and it would be fine. With the openal update, I tried it 8 times in a row without a crash. So, let's add openal as a RUN_DEPENDS to get sound in the game by default.
--Kurt Index: Makefile =================================================================== RCS file: /cvs/ports/games/minecraft/Makefile,v retrieving revision 1.13 diff -u -p -r1.13 Makefile --- Makefile 12 Jul 2019 20:46:21 -0000 1.13 +++ Makefile 30 Mar 2020 06:59:29 -0000 @@ -10,7 +10,7 @@ GH_PROJECT= minecraft GH_ACCOUNT= qbit GH_TAGNAME= ${GH_PROJECT}-${V} DISTNAME= ${GH_TAGNAME} -REVISION= 8 +REVISION= 9 CATEGORIES= games @@ -23,7 +23,8 @@ MODJAVA_VER= 1.8+ # BSD PERMIT_PACKAGE= Yes -RUN_DEPENDS= devel/desktop-file-utils \ +RUN_DEPENDS= audio/openal \ + devel/desktop-file-utils \ games/lwjgl \ java/javaPathHelper \ x11/gtk+3,-guic