Standard: Intel HD Audio.
Difference from AC'97
AC'97 has no jack sensing. Intel HD has jack sensing.
Detection: normally open.
Pinout
Mic.
| Pin | Signal | Pin | Signal | |-----|--------|-----|--------| | 1 | Port 1 L | 2 | GND (Ground) | | 3 | Port 1 R | 4 | Presence# (active low (−)) | | 5 | Port 2 R (Speaker R) | 6 | Sense1_Return (Port 1 sense) | | 7 | Sense_Send (Sense) | 8 | Key (empty) | | 9 | Port 2 L (Speaker L) | 10 | Sense2_Return (Port 2 sense) |
Mic bias is listed with the mic pins.
Sense_Send default open — i.e. when no jack. Can return to any one of port 6 or 10.
https://en.wikipedia.org/wiki/Intel_High_Definition_Audio#Front_panel_connector
Updated:
2026 Aug 19
