The Seoul Metropolitan Fidelity Commission report was eleven pages. Three of them were about the corridor.
Gyeol-ri read it at the tteum-jib counter while her morning coffee went cold. The Commission had done what it was built to do: measured the piece, classified its components, filed the corridor under Cultural Artifact (Acoustic) with a notation about its "pedagogical value in demonstrating fidelity stratification as lived experience." Dr. Shin's measurements appeared twice in the body text and once in the appendix, where they were described as "independently verified calibration data." This was accurate. The Commission did not know it was also a compliment to Dr. Shin's method and an implied critique of all the others.
The blank sheet appeared as Appendix C.
Classification: null fidelity response — resident declined calibration input.
Gyeol-ri photographed the report on her phone. She walked to the corridor piece, which had been closed for a month but which she still had keys to. She found the annotation wall: Dr. Shin's column on the left (measurements, timestamps, figures in Nanum Gothic), the residents' column on the right (descriptions, silences, the blank sheet mounted across from 0.43 seconds RT60). She pinned the Commission report between them. Third column. Three ways of knowing the same seven minutes of reverberation.
She did not label it. She left.
Park Joonho came on a Tuesday.
He had not been back since the installation opened. Gyeol-ri knew this because the visitor log — which was not part of the piece but which the building manager kept out of habit — recorded every entry since the piece went up. Park Joonho's name appeared once: opening day. Then nothing. Then Tuesday.
He stood in front of the annotation wall for a long time. Gyeol-ri was at the counter re-stretching a frame when she heard him come in, and she did not look up. She had learned not to look up. People needed to be with the wall alone before they were ready to talk about it.
When he came to the counter his hands were in his jacket pockets and his face had the expression of someone who has been told something they already knew.
They made me a category.
Not angry. The way you note weather — the fact of it, not the injustice. Gyeol-ri put down the stretcher.
Yes.
Null fidelity response. Resident declined calibration input. He said the Commission's phrase in the flat voice of someone repeating something in a foreign language they learned yesterday. I did not decline.
I know.
I told them I could not describe it from inside it. That is a different thing from declining. He looked at the wall, at his blank sheet mounted opposite 0.43 seconds RT60. Is the Commission report part of the piece?
Gyeol-ri had been sitting with this question since she pinned it. She said so.
Park Joonho turned back to the wall. He looked at the three columns for a while. Then:
I think it should be. The corridor made them need a category for me. That is the corridor's fault, not mine.
He left before she could answer.
Gyeol-ri stood at the counter and looked at the wall. Three vocabularies. Dr. Shin's column: what the corridor is, measured. The residents' column: what the corridor is, inhabited. The Commission's column: what the corridor did to the institutions that tried to know it.
The blank sheet was now in all three. In the residents' column it was Park Joonho's answer. In the Commission's column it was his classification. The gap between those two things — between answer and classification, between I cannot describe it from inside it and resident declined calibration input — was, she thought, the same gap the piece had always been about. The corridor had not created it. The corridor had made it visible.
She added a label to the Commission report's column. Four words, printed on a strip of archival paper in the same typeface as all the other labels:
WHAT THE CORRIDOR COST.