MSI NVIDIA MS-7504PV - Manual (Page 22)

MS-7504 Mainboard
2-10
Audio Ports
These audio connectors are used for audio devices. You can differentiate the color
of the audio jacks for different audio sound effects.
Line-In (Blue) - Line In is used for external CD player, tapeplayer or
other audio devices.
Line-Out (Green) - Line Out, is a connector for speakers or head
phones.
Mic (Pink) - Mic, is a connector for microphones.
RS-Out (Black) - Rear-Surround Out in 4/ 5.1/ 7.1 channel mode.
CS-Out (Orange) - Center/ Subwoofer Out in 5.1/ 7.1 channel mode.
SS-Out (Gray) - Side-Surround Out 7.1 channel mode.