Prism MIDI Sequencer

iOS Universel / Musique

Prism is a 16-track AUv3 MIDI step sequencer for iPhone and iPad that turns sparks of inspiration into living, breathing music. It’s built for touch and flow—pair it with your favorite synths, samplers, drum apps, and gear.

Key Features
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[ Sequencing Engine ]
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- High resolution:
1/32 steps, up to 512 trigs/pattern, swing, polyphony, micro-timing per step

- Elastic timing:
per-sequence lengths plus smooth speed changes for real polyrhythm/polymeter

- Per-step control:
parameter locks and Step FX

- Playback modes:
Standard, Overlap, Trig Legato, Drone

- Capture everything:
live record with quantize, retroactive recording (always listening), and tap-in steps

- Human feel & probability:
Chance, Every, Hold, Range, Accent


[ Tonal Tracks (Melody & Harmony) ]
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- Always in key:
scale modes across the app (use built-in scales or create your own)

- Note input modes:
Poly, Chord Simple, Chord Multi, Chord Blocks

- Flow modes (musical logic):
Standard, Peek, Echo, Melt, Mirror

- Per-Trig Step FX:
Velocity, Pitch, Ratchet, Strum

- Multi-Seq:
4 independent sequencers per tonal track to weave interlocking parts

- Import and edit .MIDI files


[ Drum Tracks (Kits & Samplers) ]
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- 16 mini-sequencers per drum track with independent settings, FX, and controls

- Modular linking, advanced layering, and Drum↔Tone interactions for shared timing tricks

- Drum profiles for fast kit routing and universal connectivity

- Per-Trig Step FX (drum):
Velocity, Length, Ratchet, Flam


[ Modulation, Generative & Creative Tools ]
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- 6 LFOs per track (track-tied and CC-tied) for tempo-synced movement and evolving patterns

- Per-track/pattern 16-step Arpeggiator—from classic to experimental

- Harmonizer and Hue Sequencer for chord color and phrase rotation

- Tape-style MIDI Slicer & Looper (per track/pattern) for instant remixing

- Smart randomizers:
one-tap generation for drum patterns, sequences, and fx.


[ Performance, Workflow & UI ]
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- Scenes, mute profiles, and bar looper to play, capture, and perform.

- Fast edits:
copy, paste, multi-select, quick duplicate

- Multi-touch keypad matrix & sequencer for hands-on control

- Light & Dark themes

- Host-aware saving (internal presets + AUv3 state)


[ Hardware & Host Integration ]
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- Deep, bi-directional control for Novation Launchpad (Pro, Mk3, Mini, X) and Launchkey Mini MK4 with LED feedback & mappings

- External MIDI in/out/thru, per-track channel routing

- AUv3 works in leading hosts (e.g., AUM, Logic Pro for iPad)


[ Timing & Specs ]
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- High-precision engine:
480 PPQN for tight playback at any tempo

- iPhone & iPad AUv3 (MIDI-only; no built-in sounds)

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Find more info at sites.google.com/view/prism-midi-sequencer/home

Happy creating, y’all.

—A Mortal Mage

Quoi de neuf dans la dernière version ?

What's New in Prism

Advanced Swing — Long press the Swing parameter in Track Select to explore hundreds of swing profiles. Works with Euclidean sequences too.

Ghost Notes — Set velocity to zero to place ghost notes. They don't trigger any sound but can hold parameter locks. Pair them with the Euclidean sequencer to carve out empty space in your patterns.

Step FX Snapshots — A new snapshot grid makes it easy to recall Step FX presets. Long press the Step FX icon on the GUI screen to access it.

Time Machine — Prism now silently captures your state every 15 seconds (configurable in Device Settings), storing the last 16 snapshots. Hold Shift and press Undo to jump between them — instant undo/redo.

External MIDI Pipe — Open a separate MIDI connection for Launchpad or Launchkey, perfect for working inside Loopy Pro. Enable it in Settings → External Input.

Launchpad Sequence View — A simplified 64-step view for Launchpad. Access it from the top control bar, 4th button from the left.

New Conditional: Skip First Loop — Scroll to the bottom of the "Every" conditional to find it.

Bug Fixes — Lots of them.