Rhythm · ternary vs binary

Sixteenths inside a swung-eighth feel

Tempo80 BPM
Swing67% · 2:1
Bars
Top bands are the ÷4 sixteenth cells (two shades); bottom bands are the ÷3 triplet cells (three shades). A hit sitting on a shade seam is on that grid; a hit floating mid-band is off it. Shared points (beat, half-beat) sit on a seam in both.
Treatment

What you're hearing

Eighth-swing imposes a ternary grid (÷3, the triplet); sixteenths want a binary one (÷4). They don't reconcile, so every idiom picks which grid wins locally. All eight treatments share one swung-eighth frame — toggle it on to hear each negotiate against the same reference. Drop the tempo low to hear why the nested roll only breathes slowly; push it up to hear straightening stop mattering.