Not sure what build this problem resurfaced but I am not getting any sound out of my rear speakers with MC. They work fine with Media Player. I have an Nforce2 MB using the latest audio drivers from Nvidia's 3.13 package (build 366). I tried the 5.1 channels setting under Output Format in the DSP Studio and that didn't help either. My speakers are Logitech Z-680's and I am using the coax digital input.
Media Center Registered 9.1.299 -- C:\Program Files\J River\Media Center\
Microsoft Windows XP Workstation 5.1 Service Pack 1 (Build 2600)
AMD Athlon 2303 MHz MMX / Memory: Total - 1048 MB, Free - 220 MB
Internet Explorer: 6.0.2800.1106 / ComCtl32.dll: 5.82 (xpsp1.020828-1920) / Shlwapi.dll: 6.00.2800.1226 / Shell32.dll: 6.00.2800.1233 (xpsp2.030604-1804) / wnaspi32.dll: N/A
Ripping / Drive F: Copy mode:Normal CD Type:Auto Read speed:Max
Drive G: Copy mode:Normal CD Type:Auto Read speed:Max
Drive H: Copy mode:Normal CD Type:Auto Read speed:Max
Digital playback: Yes / Use YADB: Yes / Get cover art: Yes / Calc replay gain: Yes / Copy volume: 32767
Eject after ripping: No / Play sound after ripping: No
Burning / Drive F: LITE-ON LTR-48125W Addr: 2:0:0 Speed:48 MaxSpeed:48 BurnProof:Yes
Drive G: SONY DVD RW DRU-500A Addr: 2:1:0 Speed:24 MaxSpeed:24 BurnProof:Yes
Test mode: No / Eject after writing: No / Direct decoding: Yes / Write CD-Text: Yes
Use playback settings: No / Normalization: None