ffmpeg: Safe Place To Cut AC3, AAC, and MP3 Audio

Does AC3, AAC, or MP3 audio have the equivalent of keyframes where it’s safe to make cuts in the audio? I have several long audio file that I need to preserve the quality of but I need to make a few edits in a specific location. I was hoping to cut the audio file into parts along the equivalent of keyframes, make the edits to the sections in question (which will will result in that section being re-encoded), and then stitch everything back together thus keeping the majority of the audio in its original quality without any re-encoding.

How would I go about finding the correct locations to split such audio files and perform the actually splitting using ffmpeg?