Smixer is a Linux program that enables users to control and display mixer volume levels through a command-line or scriptable interface.
One of the great things about smixer is that it's distributed under the GNU GPL. You can view more information about this in the "COPYING" and/or smixer.c file. This means that you can use and modify the software as needed, as long as you adhere to the terms of the license.
The usage of smixer is explained very clearly in the man page, so you can get up and running with this tool in no time. Additionally, smixer can be invoked with several command-line options for additional customization.
For example, you can use the -a option to include all devices when printing current settings, or the -p option to print out the current mixer settings and then exit. You can also use the -f option to process commands from a file and then exit, or simply run smixer with no options to process commands from stdin (interactive or from a pipe) and then exit.
Overall, smixer is a fantastic tool for Linux users who need to control and display mixer volume levels. With its scriptable interface, customizable options, and GNU GPL license, it's definitely worth checking out if you haven't already.
Version 1.0.4: N/A