If you're running an AV desk it's important that the volume settings are the same every time you boot up your computer. Otherwise your sound could be muted or too high, or your recording levels might be all out of whack.
Nirsoft offers a simple tool that has a GUI, or can be called from the command line to change the volume controls.
http://www.nirsoft.net/utils/sound_volume_view.html
Attached is a simple batch file that can automate the resetting of the speaker and recording controls.
Note that it is unable to change any AGC or Microphone Boost settings. These need to be manually changed in the Recording Devices settings.
To create the default settings file, simply run the normal Nirsoft .exe and save the current config as Default.spr.