As I am looking for a basic Sound editor, I thought at this price I should get a well designed piece of Software.

But I am honestly disapointed. Compared to Amadeus II (30$) it is way to expensive (yes I know you can use it free as it is Shareware).
Off_Topic: Even look at "MP3 Trimmer" (11$) which is really easy to use (intuitive workflows)

I did open a short m4a (AAC) file and changed the waveform's looking by changing the dropdown menu (left on the bottom) to "1/128" or "1/256" or 1/xxx while playing and it did sound ugly. ;-(

Why is there no view/window of the whole file beside the main zoom-in window (my file was only 1 min. of length)?

Maybee it has really good encoding technology behind the GUI - but I doubt that I'll ever gonna know this. The user Interface does just not satisfy me.