stumpwm-sndioctl adds some features to StumpWM so you can control the volume using OpenBSD's sndioctl, and have it show you pretty messages as you make changes.
Add something like this to your StumpWM config:
(ql:quickload :stumpwm-sndioctl)
(define-key *top-map* (kbd "XF86AudioMute") "toggle-mute")
(define-key *top-map* (kbd "XF86AudioLowerVolume") "volume-down")
(define-key *top-map* (kbd "XF86AudioRaiseVolume") "volume-up")
The code is documented in Lisp style (i.e. self documenting), see
stumpwm-sndioctl.lisp for all the knobs you can turn.
Copyright 2021, Dr Ashton Fagg [email protected]
Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.