The problem is: on some dths-hd ma files decoding with libdcadec.dll controlled with other frontend than dcadec.exe(I used eac3to) gives resulted file with offsetted audio data.
You can see detailed description with samples and discussion in eac3to's thread on doom9, beginning from this my post: http://forum.doom9.org/showthread.php?p=1758144#post1758144