I recently tried converting WMA files to AAC using the default codec, neroAacEnc.exe, in dBpowerAMP and iTunes wouldn't allow them. Files converted directly to m4A or converted from the AACs to m4A work just fine. I am easily able to convert these files directly to iTunes-acceptable MP4s with foobar2000 using the exact same NERO encoder but I can find no option or setting in dBpowerAMP to convert to MP4s. Why don't the AACs load? Does anyone know of an MP4 encoder that works in dBpowerAMP or a way to set up a custom encoding with the NERO codec?