There should be a lossless audio compression option for exporting audio only. When exporting audio, I am almost always doing so in order to do additional post-processing that is not possible in Camtasia (that's another feature idea). Rather than wasting more hard drive space with a WAV file, or having a lossy m4a, it would be nice to have a lossless compression audio export. The purpose of that file is only as a temporary means to get the audio from Camtasia to another program, so keeping the file size small but with no loss in quality would be ideal. FLAC would be my preferred option, but a lossless m4a would work too, but might get confusing with what appears to be a lossy compression used with the current m4a option. I did a null test and the WAV and m4a did not perfectly cancel. Not even close. So I assume it is lossy compression.