Hi I am Rupesh from India. I have some music files and I want to convert to m4a files.

I have tried fdk aac latest version and it doesn't have bitrate 48 kbps option and so I have installed Nero aac and tried it by adding files and by selecting Nero aac and it is not showing any options like bitrate, abr, cbr etc., even though I have pressed convert button after that it is showing errors like unable to load neroaacenc encoder etc.,. I have copied Nero encoder to "encoder/m4a Nero(AAC)" folder which is downloaded from official Nero website even no use.

Is there anyway to convert mp3 files to m4a files using 48 kbps bitrate.