
Prism MIDI Sequencer
Control • Play • Perform
$19.99 · In‑App Purchases
16-track AUv3 sequencer for iPhone & iPad. Sketch faster with polyrhythms, probability, LFOs, & arpeggiators. MIDI-only: pair with your favorite synths and drum apps.
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
What's New
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- ($) Multi-Sequencer [x4 per tone track]
- ($) LFOs [x6 per track]
- ($) Step FX [x4 per trig]
- ($) Launchkey Mini MK4 Control
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- Speed FX w/ true polyrhythms
- Triplet grid
- Arp rate: sync/free
- Edit individual notes in a step
- Dusty & monochrome color schemes
- Create custom scales
- Chord blocks: strum & velocity randomization
- 64 Scenes (up from 32)
- MIDI CC / P-Locks / sound profiles - updated workflow
- Customizable humanize & swing engines
- Drum melt filters
- Move drum trigs between sequences
- Live play/record hue shifts
- Double Tap Tracks to Send MIDI Signal (helpful for opening AUV3 windows from Prism)
- Per trig sliders
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What's Improved
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- Clock Accuracy: Tighter timing & smoother BPM changes
- Reduced CPU
- Piano Roll (8 bar view).
- Song Engine Controls
- X/Y Touch Controls
- New Views, Graphics & UI
- Cleaner workflows throughout
- Faster trig edit state locking (slide finger up after long pressing a trig)
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Prism (v2.0)
For a complete list of what's new go to:
https://sites.google.com/view/prism-midi-sequencer/resources/manual
The developer, Tyler Quatraro, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Tyler Quatraro
- Size
- 48 MB
- Category
- Music
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Multi-Sequencer [Tone Tracks] $6.99
- Step FX $6.99
- LFO Extension $6.99
- Launchkey Mini MK4 Control $6.99
- Copyright
- © 2025 Alchemy Electronica