Some vendors use Impedance Sensing to guess the nature of the analog peripheral connected as impedances are different from Microphones to headphones to speakers to line level devices. It is hardly an exact science but the results are surprisingly accurate when those who implemented it knew what they were doing... There was an MS white paper published on the subject but now I can't find it on our web site. I'll keep looking. Sincerely, Hakon Strande | Windows Sound Team PM | (p) 425.705.0637 -----Original Message----- From: wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Ernest_Burghardt@xxxxxxxxxxxx Sent: Tuesday, November 06, 2007 9:35 AM To: wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] Discovery of Analog Audio Device Hi All, Is there a way to know what the analog audio device (i.e. speaker) that is plugged into the jack? Thanks in advance, Ernie ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.com/ ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.com/
