add new post (sound flicker freebsd)

content/posts/2023-06-04-sound-flicking-and-stuttering-in-librewolf-firefox/index.md

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+# vim: ft=markdown
+title = 'Sound flicking and stuttering in librewolf/firefox'
+summary = '''Finally. Normal sound in Librewolf on YouTube. This took quite a
+  while for me to fix...'''
+date = '2023-06-04T17:03:20+0200'
+# lastmod = ''
+categories = [ 'computerstuff' ]
+tags = [ 'freebsd' ]
+
++++
+
+Let this be a quick one again: my Librewolf browser plays perfectly fine audio
+now on any YouTube video.
+
+## Settings in Librewolf
+
+Open <kbd>about:config</kbd> and look for or create `media.cubeb.backend`. This
+setting should contain a string value.
+
+```
+media.cubeb.backend               sndio
+```
+
+I've also tried to set this to `oss` but it works better with `sndio`.
+
+## System wide settings
+
+### Enable sndio daemon in <kbd>rc.conf</kdb>
+
+```conf
+sndiod_enable="YES"
+```
+
+Eventually run `doas service sndiod start`.
+
+### Settings in `sysctl.conf`
+
+```conf
+kern.sched.preempt_thresh=224
+dev.pcm.0.play.vchanrate=192000
+dev.pcm.1.play.vchanrate=192000
+hw.snd.latency=7
+```
+