I installed the latest nightly build (23 January).
When booting, there’s an annoying high pitch sound which lasts for a few seconds.
I muted all controls in mixer settings but for some reason nothing is saved,
neither between reboots, nor even between open/close of Media preferences window.
you could stop the media server process from the process controller that lives near the clock. don’t know why haiku would make such a sound. What are you running haiku on?
If you don’t find a real solution, you could also find the line “launch $SERVERS/media_server” in /boot/system/boot/Bootscript and comment it out (#) and then start it by hand after the boot has completed. Maybe putting a link to media_server into ~/config/boot/launch/ will delay its start enough to avoid the screeching.
If that delayed start isn’t enough, put a “sleep 3” and “launch $SERVERS/media_server” into ~/config/boot/UserBootscript to wait another 3 seconds before launching the server.