Not sure if It is possible without something being sent down to interfere with the Windows Audio settings.
This tool exposes some command line arguments: http://code.google.com/p/audioswitch/ and I use it at home but not for your use-case. I guess you'll need something better than this to handle muting the correct device and setting the other device as the default. Robert From: [email protected] [mailto:[email protected]] On Behalf Of Corkill, Daniel Sent: 21 October 2014 02:02 To: [email protected] Subject: [mssms] OT: Setting headphones to be default and only audio-out We have some computers that have a requirement for the speakers to be disabled and the headphone jack to be the default (and only) audio-out option. Is anyone aware if this is possible? ********************************************************************* This email, including any attachment, is confidential to the intended recipient. It may also be privileged and may be subject to copyright. If you have received this email in error, please notify the sender immediately and delete all copies of the email. Any confidentiality or privilege is not waived. Neither the Council nor the sender warrant that this email does not contain any viruses or other unsolicited items. This email is an informal Council communication. The Council only accepts responsibility for information sent under official letterhead and duly signed by, or on behalf of, the Chief Executive Officer. Privacy Collection Notice Logan City Council may collect your personal information, e.g. name, residential address, phone number etc, in order to conduct its business and/or meet its statutory obligations. The information will only be accessed by employees and/or Councillors of Logan City Council for Council business related activities only. If your personal information will be passed onto a third party, Council will advise you of this disclosure, the purpose of the disclosure and reason why. Your information will not be given to any other person or agency unless you have given us permission or we are required by law.

