In addition to Acoustica, I also use Reapear and WaveLab and both of them have special "rainbow" mode for drawing waveform, it looks like this in Reaper:
and in WaveLab:
The idea is colors mean frequencies, so it's easy to recognize "esses", breaths, mmm-sounds and so on. Perhaps in Acoustica this also would be handy, what do you think?
I love this drawing mode a lot 