iOS · MVP · Coming soon
DrumFillGenerator builds linear fills from a library of hand-transcribed patterns — then shows you each one as a color-coded step grid and on a classical staff. Sample-accurate, zero-latency, built for the music stand.
What it does
A read-only generator and trainer: clean structural fills, a rock-solid audio engine, and two ways to read every pattern.
~30 named linear fills covering every grid — 4/4 and 3/4 across quarter, eighth, sixteenth and triplet feels. They play exactly as authored.
An AVAudioEngine sampler per voice, driven by a dedicated audio-thread clock. Notes fire with no main-thread hop, so timing stays tight at any tempo.
Read every fill as a chunky color-coded step grid or a traditional 5-line drum staff — both render from the same source, perfectly in lock-step.
Accents, body strokes and ghost notes show up as bar height and a neon glow — so you read the feel of a fill at a glance, not just the notes.
Paradiddles, paradiddle-diddles, five-stroke and double-stroke rolls are spotted in the sticking and bracketed right under the bars.
A click that accents the downbeat and layers onto the same clock as the fill — plus live retempo, so you can speed a loop up without ever stopping it.
How it works
Pick a time signature (4/4 or 3/4), a subdivision from quarters to triplets, and 1–4 bars. Toggle which kit pieces are allowed to play.
A matching curated fill is preferred. When none fits your grid, the linear randomizer builds one that honors your instrument pool — one voice per step, hands cleanly alternated.
Tap a step to cue it, drag to scrub the playhead, flip between grid and staff, and loop at any tempo with the click on.
Under the hood
Be first on the kit
One email when DrumFillGenerator hits the App Store. No spam, no drip campaign — just the launch.