← back to chapter

warp-math · hand-repair a beat map

Chapter 05 saw the problems and stopped there. This is the other half: you fix a mostly-correct map by hand. The two layers built separately finally operate together — an accidental extra beat in a 4/4 bar is invisible in pure tempo terms, only the meter overlay flags it. Bars with the right beat count glow green; bars with the wrong count are flagged with the actual count. Drag a marker to move it, click a marker to select then press delete to remove it, click empty grid space to insert a beat.

1. load a beat map

Your file stays in your browser. Parsing is entirely client-side; nothing is uploaded.

2. target meter

The validator checks each bar against this count. Pickup and trailing partial bars are exempt — by definition they aren't full bars.

3. summary

beats: — · downbeats: — · bars correct: — / —

bar with the expected beat count   bar with the wrong beat count   pickup / trailing partial   beat (orange = selected)

The download is exactly the format beat_this produces, so it's a drop-in replacement for the file you uploaded.