Perpetually M4P Audio to Sound Editing - Version 1.3.62 Perpetually M4P Audio to Sound Editing - With Perpetually M4P Audio to Sound Editing you can save audio files in any of the supported formats (can also save any portion of a loaded file to disk as a new file). With Perpetually M4P Audio to Sound Editing you can edit audio files visually (Cut, Copy, Delete Selection, Crop, Trim, Paste, Paste From File, Mix, Mix From File).