A Tatum  is the "lowest regular pulse train that a listener intuitively infers from the timing of perceived musical events: a time quantum. It is roughly equivalent to the time division that most highly coincides with note onsets". It can be computed by using a histogram of inter-onset intervals.
- Tristan Jehan, Creating Music By Listening. PhD Thesis, MIT 2005, section 3.4.3
- Bilmes, Jeffery Adam (6 August 1993). "Timing is of the Essence" (PDF). washington.edu. Washington University. Retrieved 11 January 2017.
When I asked Barry Vercoe if this concept had a term, he felicitously replied 'Not until now. Call it temporal atom, or tatom.' So, in honor of Art Tatum, whose tatum was faster than all others, I chose the word tatum.
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