I have had the same problem for quite sometime when using an output format of 5.1 and seeking through a track. Here's what usually happens:
I start playing the file, sound is in 5.1
If i skeep further down the track, it switches to stereo sound half the time
If i skeep again, it switches back to 5.1
This is weird and I was wondering what could be causing such a problem.
::::::::::::::EDIT:::::::::::
Just realized this also happens when skipping to the next track.
-Cas
Sound card is Soundblaster Live! 5.1
Media Center Registered 11.0.103 -- D:\Program Files\J River\Media Center 11\
Microsoft Windows XP Workstation 5.1 Service Pack 2 (Build 2600)
AMD Athlon 1052 MHz MMX / Memory: Total - 523 MB, Free - 115 MB
Internet Explorer: 6.0.2900.2180 / ComCtl32.dll: 5.82 (xpsp_sp2_rtm.040803-2158) / Shlwapi.dll: 6.00.2900.2180 (xpsp_sp2_rtm.040803-2158) / Shell32.dll: 6.00.2900.2180 (xpsp_sp2_rtm.040803-2158) / wnaspi32.dll: N/A
Ripping / Drive I: DVDRW IDE1008 Mode:Normal Type:Auto Speed:Max
Drive J: Generic STEALTH DVD Mode:Normal Type:Auto Speed:Max
Digital playback: Yes / Use YADB: Yes / Get cover art: No / Calc replay gain: Yes / Copy volume: 32767
Eject after ripping: Yes / Play sound after ripping: No
Burning / Drive I: DVDRW IDE1008 Addr: 1:1:0 Speed:2 MaxSpeed:40 BurnProof:Yes
Test mode: No / Eject after writing: Yes / Direct decoding: Yes / Write CD-Text: Yes
Use playback settings: No / Normalization: None