Aphex Twin hid his grin in a spectrogram. The image was the sound. This asks the opposite question: does a corpus have a face?
"the face was supposed to be watched with a logarithmic frequency scale"
1 · feed it a corpus
2 · see it as sound
the spectrogram. frequency up, time across. brightness = energy.
A clean corpus, where every entry shares the schema, produces an even, banded spectrogram. A broken one, where fields are missing or mismatched, produces noise and gaps. You can see the difference before you read a single field. That was the whole point of the interop work: a clean pipe has a shape. Now it has a sound too.