It is a lab of student machines in which we do not want any sound coming from any of the Student Machines. Does this also turn off the response from the keyboard volume controls if I restrict the user account from the sound controls?
System/Library/Extentions/AppleOnboardAudio.kext
Warning. Here be dragons. You may need to reinstall the OS if this really breaks things. I haven't tried doing anything because frankly, it scares me.