Can they be played in Windows Media Player?
I just switched to the k-lite codec pack (thanks imjustagamer!), and playback once again works just fine. however, the same problems i had before (where conversion, track analysis, and playback stop at 99-100%) exist once again.
this might be related: when it is doing a track analysis, several of the sys tray icons for the decoder show up, right now 8 or so are open from when I was doing track analysis. These all opened after trying to analyze aac files.
ill provide sys info to help in your quest to perfect this:
Media Center Registered 11.1.71 -- C:\Program Files (x86)\J River\Media Center 11\
Workstation 5.2 Service Pack 1 (Build 3790)
AMD Unknown 1005 MHz MMX / Memory: Total - 1047 MB, Free - 482 MB
Internet Explorer: 6.0.3790.1830 / ComCtl32.dll: 5.82.3790 / Shlwapi.dll: 6.0.3790 / Shell32.dll: 6.0.3790 / wnaspi32.dll: N/A
Ripping / Drive D: _NEC DVD_RW ND-3500AG Mode:Normal Type:Auto Speed:Max
Drive E: Mode:Normal Type:Auto Speed:Max
Digital playback: Yes / Use YADB: Yes / Get cover art: Yes / Calc replay gain: Yes / Copy volume: 32767
Eject after ripping: Yes / Play sound after ripping: No
Burning / Drive D: _NEC DVD_RW ND-3500AG Addr: 0:2:0 Speed:48 MaxSpeed:48 BurnProof:Yes
Test mode: No / Eject after writing: Yes / Direct decoding: Yes / Write CD-Text: Yes
Use playback settings: No /