The Skit Economy

"Intro" is the single most common track title in the database — sixty-two thousand of them — which means the most-recorded idea in music is clearing the throat. This piece audits the whole family: every album track titled Intro, Outro, Interlude, Skit, Intermission, or Prelude, some ninety thousand across 1.3 million albums, by share and by stopwatch.

The census finds a birthday. In the vinyl decades these titles are rare — one to two album tracks per thousand — and, crucially, long: the 1970s median "Intro" runs 2:16, the 1950s 3:13. Those are real pieces of music that happen to be named modestly (the prog overture, the orchestral prelude). Then the CD arrives and the numbers snap: by the 1990s the share has doubled and the median length collapses to 1:34; by the 2000s — the peak — the share reaches 0.65 percent, one album track in 154, at a median of 1:20. Same words on the tracklist, different animal on the tape: the modern skit is not a short song but packing material, born the moment the container grew eighteen spare minutes and something had to fill them. The hip-hop skit, the spoken interlude, the answering-machine bit — the CD paid for all of it by the disc, and the tracklist absorbed it by the dozen.

And now the ebb: 0.54 percent in the 2010s, 0.48 in the 2020s, sliding back down as the skip economy punishes any track a listener won't replay — a skit's stream count is a public embarrassment the CD never had to endure. The interlude is not dead; it is merely returning to its pre-CD rate, completing a neat sixty-year round trip. The album inhaled, as documented, and the skit was a good part of the breath: filler rose with the format that had room for it and recedes with the format that bills by the listen. Packing material, in music as in shipping, is an honest measure of how much box exceeds how much goods.

Method: studio albums (primary type Album), earliest dated release per group, 1950–2026; tracks whose recording title begins with intro/outro/interlude/skit/intermission/prelude (case-insensitive, word-boundary): ~90k of 17.9M album tracks. Shares per decade; medians over stated lengths 1s–10min. The vinyl-era entries are largely genuine musical preludes — the category is defined by title, not content, and the length collapse is precisely the evidence that the titles changed species. Computed August 2026 against the 2026-07-25 MusicBrainz build.