E445 data transfer problem WMP 12
I just purchased an E445 but previously ripped all my CDs to (non-DRm'd) AAC format (m4a). The E445 can play the files but when transferring using WMP 12 (my OS is Windows 7) the player automatically converts the m4a files to WMA. I want to prevent this as it degrades the sound quality but can't see how to do this. AFAIK when using MTP the device "tells" WMP the file types it supports and based on this information, WMP will decide whether conversion is required. Is this a known problem, or am making a basic mistake? For now I'm using Explorer to transfer files but playlists are a bit tedious to sort out.
Thanks for any help/suggestions.