volume

[unicorn]

I have to run these commands every time I start OpenBSD. I want them to be executed automatically every time I start OpenBSD, so I added them both to /etc/rc.conf.local and .cshrc but neither works. How to make them work?

sndioctl output.level=1
sndioctl server.device=1

[Head_on_a_Stick]

Try adding the lines to the end of ~/.profile or ~/.login instead. Use the former if you still have ksh set as the login shell and the latter if you've switched to csh for both interactive and login shells.

I don't think /etc/rc.conf.local will work because the commands would be run as root rather than your user and ~/.cshrc will only be read if an interactive shell is opened.

You could also use ~/.xsession to run the commands when the graphical desktop is started by xenodm(1): https://man.openbsd.org/xenodm#SESSION_PROGRAM

[unicorn]

I added them to my home directory .profile, but only the second command works. The first command works after I added it to the root directory .profile, Thanks.

[Head_on_a_Stick]

If both commands work for your normal user then they shouldn't need to be in root's directory.

See https://www.openbsd.org/faq/faq13.html#default for other ways to set the default output device.

[unicorn]

there's no sound after I run those commands and server.device=1 disappear from sndioctl output:

# rcctl set sndiod flags -f rsnd/1
# rcctl restart sndiod

I can't execute sndioctl server.device=1 after I run these commands because 1[-1] invalid value:

# rcctl set sndiod flags -f rsnd/0
# rcctl restart sndiod

How to go back to previous?

[unicorn]

sound back again after I run these command:

# rcctl set sndiod flags -f rsnd/0 -F rsnd/1
# rcctl restart sndiod

[rufwoof]

man mixerctl

/etc/mixerctl.conf:

outputs.master=255

sets the system wide level, similar to sndioctl output.level=1