Treadmill
StepMania stepfile generator
Source audio
Drag & drop an MP3 or OGG here
or click to browse
A folder that already holds audio and its .sm. The chart is written back
into that stepfile in place — its other difficulties, artwork and preview sample are
kept, and the file it replaces is backed up beside it.
Video & art
Centre-cropped to a StepMania banner. Picking one also sets it as the background, uncropped.
The folder, .sm, audio and .zip all use this name; the title
and artist tags keep exactly what you type.
Chart
On-beat and readable: quarters and eighths, almost no crossovers.
How far apart the notes inside a run sit.
A DDR-style meter. Replaces Beginner/Easy/Medium/Hard/Challenge, which the corpus shows are far too coarse to be a spec — across 3,757 official charts, "Medium" spans meter 2 to 15.
Optional — steers the AI toward a reference chart's feel and its era's design language. Naming a song in the description does the same.
Verify sync
Analyzing audio…
Bar lines fall every 4 beats from the offset. The downbeat click is pitched lower — it should
land where the music's bar starts. Pull the song down to hear the click on its own, or the
click down to check it against the mix.
Shift-drag the waveform to pick a stretch that
keeps steady time, then fit the BPM and offset to just that — the grid still applies to the
whole song.
Grid fitted from onward and backfilled to the start of the track — the grid still applies to the whole song.
Beat grid: beats fitted, residual , downbeat confidence
Suggested correction: (confidence )
⚠ Sync drifts across the track () — BPM may be off. Corrected BPM:
Generate
Initializing…
