i have an ASUS M4A87TD EVO motherboard. ASUS has this to say about onboard audio:
VT1818 High Definition Audio 8-Channel CODEC
- Supports Jack-Detection, Multi-Streaming, and Front Panel Jack-Retasking
- Optical S/PDIF Out ports at back I/O
- Supports 192kHz/ 24bit BD Lossless Sound
- ASUS...