I am saving audio data using the Sony AVC/MVC audio codec as an MP4 audio file with an extension of .M4A. Almost all codecs write the encoder in the output file, but the Sony AVC/MVC codec leaves encoder blank with no information at all. Sony owns this encoder. Does MAGIX now also own it? Can you write relevant encoder information into the output files as every other audio codec does? Here are some example to give you an idea of what you are missing:
Here is what the Sony AVC/MVC codec writes upon saving:
This is the latest version of Sound Forge version 14 build 65.