# MIDIRack

> the ultimate MIDI toolkit

Canonical page: [https://chrome-stats.com/d/id6779712751](https://chrome-stats.com/d/id6779712751)

## Overview

- **ID:** `id6779712751`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Kai Aras
- **Category:** Music
- **Rating:** 4.80 / 5 (8 ratings)
- **Version:** 1.1
- **Last updated:** 2026-09-03
- **First published:** 2026-08-20
- **Size:** 28 MB
- **Data as of:** 2026-09-18
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/midirack/id6779712751)
- **Website:** [https://numericalaudio.com/midirack](https://numericalaudio.com/midirack)
- **Privacy policy:** [https://numericalaudio.com/privacy\_policy.html](https://numericalaudio.com/privacy_policy.html)

## Description

MIDIRack is a MIDI toolkit for iPad. Build a custom touch surface from the KB-1 keyboard suite, an all-new sequencer suite, knobs, faders, buttons and more — then unlock a visual MIDI processing graph (one time in-app purchase) and wire it into anything, from a simple custom controller to a full-on groovebox or a self-playing generative composer. Play it on its own and send MIDI anywhere, as an AUv3 plugin in your favourite host or a standalone instrument.

THE BASE APP — PERFORMANCE SURFACE

Design a custom control surface on a snapping grid:

• The KB-1 keyboard suite — piano, diatonic chord pads, scale-locked keyboard, MPE Seaboard ribbon, MPE Strings grid (4ths), and a 4×4 GM drum-pad grid. Each is its own routable node with latch and octave shift. Successor to the KB-1 Expressive Keyboard Suite. 
• A suite of sequencers — drum, melody, chord, analog and CC step grids and a Matrix note grid, with a moving playhead, swing and microtiming. Per-step velocity, probability, tie and trigger conditions; pattern chaining and 4-pad scene switching for full arrangements; a knob-per-step analog machine that re-roots live as you play. 
• Knobs, faders, XY pads, buttons and live visualizers — bind to raw MIDI CC or graph parameters.

On its own: a rich custom control surface builder — send MIDI and CC to any synth, app or hardware, no graph required.

WITH YOUR DESKTOP DAW

Expressive MPE hardware costs hundreds. MIDIRack turns the iPad you already own into a controller for Logic, Live, Bitwig, Cubase or any desktop DAW:

• Two MPE surfaces — the Seaboard ribbon and the Strings grid send per-note pitch bend, slide and pressure to any MPE-capable instrument on your desk. • A controller that changes per track — MPE ribbon for the lead, drum pads for the beat, chord pads for the progression, faders mapped to CC for a mix move. Rearrange in seconds; save a surface per project. • Sequence it too — clock the step lanes to your DAW and drive its tracks. • Easy to connect — one USB cable to a Mac via IDAM (Inter-Device Audio and MIDI), or wirelessly over Bluetooth MIDI. No driver, no helper app.

UNLOCK — MIDI GRAPH (in-app purchase)

Wire MIDI In → processors → MIDI Out on a visual canvas:

• 60+ node kinds — arpeggiators, scale/key quantizers, transposers, chords, echoes, swing, humanize, euclidean rhythms, random/generative melodies, LFOs, CC tools, an analog knob-per-step sequencer, a Matrix sequencer and a Counter. • Built-in instruments — Synth, Drums, a Sampler and a loop Slicer make sound right in the graph; no external synth required. • Emergence generators — Conway's Game of Life, Turing machine, Wolfram rules, Markov, bouncing balls, Lorenz attractor — for evolving, living patterns. • Presets — factory patches grouped by category (control surfaces, generators, keyboards, utilities): Amen Engine, Starfield, Conway Choir, Turing Bass, Cellular Drums… Save your own.

ROUTING & MPE

• MIDI Out exposes all 16 channels plus an MPE connector — multitimbral, multi-instrument setups. The built-in synth responds to MPE. • Every keyboard is its own node — process and route each one independently.

PLAYS OUT OF THE BOX

• Built-in polyphonic synth, drum kit, sampler & slicer  or send MIDI to your gear via CoreMIDI and an always-on virtual port.

## Rankings

- #359,825 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6779712751)