Before I just recently went to Win7, on XP I was piping audio out through an S/PDIF adapter mini-card to my HT receiver in the next room. On Win7, even though audio on the pc is just fine on it's own stereo speakers, the receiver doesn't get a signal from the pc. No wiring has changed, nothing hardware, only the OS AND the sound driver. On XP, with my ASUS mobo, I was using the ASUS recommended Realtek sound driver. On Win7 I'm using Micrsoft's built-n High Definition Audio driver. So I tried installing the latest Realtek driver. Not only still no sound to the receiver but also no sound on Skype. Unacceptable, so I uninstalled the Realtek and at least Skype works.
Operating System
MS Windows 7 32-bit SP1
CPU
AMD Athlon 64 X2 4400+ 44 °C
Brisbane 65nm Technology
RAM
2.00 GB Dual-Channel DDR2 @ 383MHz (5-5-5-15)
Motherboard
ASUSTeK Computer INC. M2A-VM HDMI (Socket AM2 )
Graphics
ASUS VH235 (1920x1080@60Hz)
ATI Radeon HD 5570 (Sapphire/PCPartner)
Hard Drives
313GB Seagate ST3320620AS ATA Device (SATA)
977GB Western Digital WDC WD1001FAES-22W7A0 ATA Device (SATA)
Optical Drives
ASUS DRW-24B1ST
Audio
High Definition Audio Device
Operating System
MS Windows 7 32-bit SP1
CPU
AMD Athlon 64 X2 4400+ 44 °C
Brisbane 65nm Technology
RAM
2.00 GB Dual-Channel DDR2 @ 383MHz (5-5-5-15)
Motherboard
ASUSTeK Computer INC. M2A-VM HDMI (Socket AM2 )
Graphics
ASUS VH235 (1920x1080@60Hz)
ATI Radeon HD 5570 (Sapphire/PCPartner)
Hard Drives
313GB Seagate ST3320620AS ATA Device (SATA)
977GB Western Digital WDC WD1001FAES-22W7A0 ATA Device (SATA)
Optical Drives
ASUS DRW-24B1ST
Audio
High Definition Audio Device