Asus Xonar U7 Guide De Démarrage Rapide page 9

4.1.3 Connecting microphone / Line-In
No Item
1 Microphone In /
Line In port
OR
1
HP Out Mic In/Line In
Connect the microphone's 3.5mm plug into this Mic-In
port for voice communication, recording, or karaoke.
Connect the .5mm plug of the CD/MP Player or any
other Line level analog audio sources into this Line-In
port for sound recording.
ASUS Xonar U7 Quick Start Guide
Description