I need to make my own hd audio ports for my front panel, because the ones available for purchase are cheaply made and don't last. I understand most of the pinout in the specs regarding the intel hd audio header, but the purpose of input 4, presence#, isn't clearly specified. It's described as an "Active low signal that signals BIOS that an Intel® HD Audio dongle is connected to the analog header. PRESENCE# = 0 when an Intel® HD Audio dongle is connected".
Sense_send, Sense1_return, and sense2_return seem to be the circuit/s used for jack detection. Pins 1, 2, 3, 5 & 9 are clearly used for audio input/output. The purpose of Presence# isn't clearly defined, unless the term "Intel® HD Audio dongle" is defined; and the term "Intel® HD Audio dongle" is not defined here:Front Panel Audio Connector and Header Pinouts for Intel® Desktop... , or anywhere else that I can find using google.
Can I ignore Presence# and still get full functionality out of my audio ports, or does it serve some important purpose that I'm not aware of?
(I'm not sure that I expect to get an accurate answer here, but I guess it doesn't hurt to ask)