The first awards on this record were given for the 1954-55 season. Outstanding Sound Design does not appear until 1979-80. Twenty-five seasons separate the two, and for all of them the person deciding what an audience heard was simply not named.
The comparison that makes the gap legible is not with the other crafts. It is with music. Outstanding Music and Outstanding Lyrics both appear in 1968-69, eleven seasons before sound design. Writing the tune counted as authorship almost immediately. Delivering it did not count as anything.
Set design arrives in 1968-69 too, costume in 1969-70, lighting in 1974-75. Sound is five seasons behind lighting and eleven behind the score. It is the last of the five original craft headings to exist, and by some distance.
The likeliest reading is that the trade classified the work wrongly. Composition was authorship; amplification was plumbing. A carpenter builds a flat you can point at, and a lighting designer makes a picture. Sound solves a room, and a room solved does not look like anything.
That reading is supported by what happened next. Once sound design existed as a heading it behaved like the others: it split across musical and play in 2009-10, the same way scenic design had split in 1995-96 and costume would in 2015-16. It was a craft all along; it was named late.
The practical consequence for anyone using this record is that a sound designer working before 1980 is unfindable in it. Not under-represented โ absent. The work happened in every production listed; the paperwork begins twenty-five years in.