// LOADING OSUMAUK
// LOADING OSUMAUK
Columns, notes, and hold notes scrolling toward a judgement line — everything you need to start playing osu!mania, the 4K/7K vertical-scrolling rhythm game.
By OSUMAUK Staff
osu!mania is the vertical-scrolling rhythm game (VSRG) ruleset built into osu!. If you have ever looked at Dance Dance Revolution, StepMania, Beatmania IIDX, or a mobile game like Cytus, the format will feel familiar: notes fall from the top of the screen toward a fixed judgement line at the bottom, and you press the matching key the instant each note crosses that line. There is no cursor, no aiming, and no clicking circles in arbitrary positions on screen. This makes osu!mania the most mechanically distinct of the four osu! rulesets and a natural home for keyboard players.
This guide walks through the playfield, key counts, the note types you will encounter, how reading and scroll speed work, the judgement and accuracy system, hand placement, and a set of beginner tips to keep you improving instead of frustrated.
In osu!standard you move a cursor across a two-dimensional playfield and click hit circles, follow sliders, and spin spinners — aim and tapping rhythm are blended together. osu!mania throws aim out entirely. The screen is divided into a fixed number of vertical lanes called columns, each bound to a single key. Notes only ever travel straight down their column, so your entire job is timing and finger coordination across several keys at once. Where osu!standard rewards mouse control and tap consistency, osu!mania rewards finger independence, pattern reading, and stamina.
The notes flow from the top of the conveyor down to the key controls at the bottom. Just above those controls sits the judgement line — the moment a note touches it, you press that column’s key. Each column maps to exactly one key on your keyboard, and you read the chart as a stream of notes assigned across those columns.

A key count, written like "4K" or "7K", is simply the number of columns in the chart. The two most popular and most heavily mapped formats are 4K (four columns) and 7K (seven columns). The ranked keymodes — the ones that award performance points (pp) — span 4K, 5K, 6K, 7K, 8K, and 9K. Using the manual xK mod you can force anywhere from 1 to 9 keys, but doing so applies a score multiplier reduction.
Don't lock yourself into 4K forever if you want to play 7K or 8K eventually. The wider keymodes are harder at the start, but if you only ever practice 4K it becomes much more painful to pick them up later. Dabbling in both early builds the finger independence you'll need.
The standard note is a single tap: press the column’s key once as it reaches the judgement line. Charts built mostly from single notes are nicknamed "rice" because the falling notes look like scattered grains.
A hold note, also called a long note or LN, is an elongated bar. You press the key when the head crosses the judgement line and keep holding until the tail crosses it, then release. Releasing too early or too late costs you accuracy. Charts heavy on long notes ("LN charts") play very differently from rice charts and reward smooth, controlled holds over rapid tapping. Mappers usually set a lower Overall Difficulty when a chart is LN-heavy and a higher one when it is mostly single notes.
Reading in osu!mania means recognising patterns — jacks (repeated notes in the same column), chords (multiple columns at once), streams, and staircases — fast enough to react. The single biggest comfort setting is scroll speed: how fast notes travel down the screen. A faster scroll speed spreads notes apart vertically and makes dense sections easier to parse; a slower speed crams more notes on screen at once. There is also a "Scale osu!mania scroll speed with BPM" option that keeps the visual speed consistent across songs of different tempos so you don’t have to constantly readjust.
Every note you hit is graded by how close your press was to the perfect timing. The judgement tiers, from best to worst, are MAX (rainbow 300), 300, 200, 100, 50, and MISS. Better judgements give more score and raise your accuracy percentage; late presses, early presses, and misses drag it down. Overall Difficulty (OD) controls how tight those timing windows are — higher OD means you must be more precise to earn a MAX or 300. A chart marked with a "↓" after the key count (for example 4K↓) is played with looser, more forgiving judgement windows than usual.
For 4K, the default D, F, J, K layout rests naturally on the home row's index and middle fingers — left hand on D and F, right hand on J and K. It is comfortable for most players, but key choice is genuinely a minor concern until you reach higher levels, so use whatever feels natural (ASDF, numpad layouts, and others are all common). For 7K, the most popular setup places the spacebar as a central thumb key with letter keys fanning out on either side.
osu!mania has a steeper initial learning curve than the other rulesets because you are coordinating several fingers from your very first map, but it is enormously rewarding. Pick 4K, set a comfortable scroll speed, and start chasing those MAX judgements.