Cascade

Edit osu!mania scroll velocity in your browser

Scroll velocity (SV) changes how fast notes travel without moving them in time. It is how mania charts get freezes, jumps and speed-ups, and traditionally you place green timing points by hand and guess at the result. Cascade's SV editor generates the points for you, draws the curve before you commit, and plays the effect back live in the editor and in playtest.

How it works

1. Open your map in Cascade and choose SV in the top menu, next to Timing.
2. Select the notes the effect should cover — the range fills in from your selection — or type start and end times and set them from the playhead.
3. Pick a generator: Constant, Ramp, Stutter or Remove.
4. Watch the preview graph: your current SV is drawn in grey, the result in teal.
5. Apply, press play to see the scroll warp, then F5 to playtest it. Ctrl+Z undoes the whole range at once.

The generators

• Constant holds one speed across the range. 2x makes notes travel twice as fast, 0.5x crawls.
• Ramp glides from one speed to another along an easing curve — linear, sine, quad or exponential, each in, out or in-out — so a build-up can accelerate the way the music does.
• Stutter bursts fast at the start of every beat then slows to compensate, so the chart never drifts out of position. Cascade computes the compensating speed for you and warns when a peak is too strong to fully cancel out.
• Remove clears every SV point in the range and returns it to 1x.

BPM gimmicks work too

osu!mania scrolls faster at higher BPM, so a lot of charts build their effects out of red lines rather than green ones: a huge beat length freezes the field, a tiny one teleports it. Cascade can preview those exactly like the game does, picking your map's real tempo as the reference so a chart full of freezes still scrolls normally in its musical sections. The editor starts on Quaver-style constant scroll where only SV matters, so turn on BPM affects scroll speed in Settings when you want the osu!mania view.

Scroll speed and SV are different things. Your editor scroll speed is a personal preview setting and is never written to the exported file, because mania players pick their own speed in game. SV is part of the chart and does export.

Why preview matters

Hand-placing green lines means exporting, loading the map in the game, seeing the effect for the first time, and going back to adjust the numbers. Because Cascade renders the same scroll model the game uses, the preview and the playtest already show you the finished effect, so the loop takes seconds instead of a round trip. When the chart plays the way you want it, export a .osu or .osz, or keep working with a song pack or a StepMania / Etterna conversion.