http://www.nirsoft.net/utils/nircmd.html

• windows
• software
• utilities
• tools
• utility
• commandline
• speaker
• switcher
• audio
• device

https://www.raymond.cc/blog/easily-change-or-switch-the-default-audio-sound-output-in-windows-vista-and-xp/

• software
• sound
• windows
• switcher
• audio
• output