SoundVolumeCommandLine (svcl.exe) allows you to perform actions related to sound volume directly from the command line.

SoundVolumeCommandLine allows you to set the sound volume, mute/unmute, increase/decrease volume, set the volume level of a specific channel, set the default render/capture device, and get the current sound volume level of a particular device, and more.

svcl.exe is the console version of SoundVolumeView. You can use all the commands of SoundVolumeView in svcl.exe, using the same syntax.

There is also a new command, /Stdout, available only in svcl.exe, which sends information related to the executed command to stdout.

By default, when you use a command to get the current sound volume or mute state, the value is returned through the return code of the .exe file, and you can get it with the %errorlevel% variable, for example, svcl.exe /GetPercent "Realtek High Definition Audio\Device\Speakers\Render."
echo %errorlevel%

With svcl.exe, there is another option, you can add the /Stdout command, and then the value will be sent to stdout, and it'll be displayed inside your command prompt window, for example:
svcl.exe /Stdout /GetPercent "Realtek High Definition Audio\Device\Speakers\Render"

If you add the /Stdout command to a set command ( /SetVolume, /SetDefault, /Mute, /ChangeVolume, and others), the list of the found sound items will be sent to Stdout, so you can see which sound items are affected by the executed command.

Several command-line examples are available at the author's site.

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