Gridification (noun): the algorithmic quantization of human-performed timing. The term was introduced by Jeffrey Anthony.
Hit records used to drift in time the way people do. Since around 2001, that movement has been vanishing from the charts.
Pick a year. Each bar is that recording's full tempo range, centered on its own average tempo. A single tick with no bar means the analysis returned one unchanging tempo.
Each dot is one of the 330 year-end top-five chart positions, placed by year and by how much the tempo moved within the recording. Orange dots registered no detected tempo movement. Tap or hover any dot to see the recording.
Vertical axis is tempo standard deviation in BPM on a square-root scale, so the recordings with very large movement stay on the chart without flattening the rest.
Share of top-five hits with no tempo movement at all, by decade. In the 1960s and 70s, not one held to a single unchanging tempo. Today most do.
Pro Tools Beat Detective, the tool that snaps recorded audio to a grid, shipped in 2001. It is the fault line in the data.
Median standard deviation of tempo within each song, by decade (BPM).
Search the dataset by song or artist. Two to start: The Beatles in 1968 and The Weeknd in 2020.
All 330 chart positions. Click a column header to sort. Type to filter by song, artist, or year.
| Year | Rank | Recording | Artist | Avg BPM | Tempo SD | Range (BPM) | Transitions |
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These figures describe the tempo surface of the finished recordings. They do not identify the tools used on any single track, or measure the timing of individual musicians.
What we lose, civically, when recordings stop keeping human time.
The real inflection point was not generative AI. It was 2001.
A grid can be a compositional choice without being a corrective regime.