# midiSequencer

> Step sequencer for creating unique synth melodies and rhythms with extensive parameter control. (iPhone/iPad app by anthony saunders.)

- Source: https://appshunter.io/ios/app/midisequencer/id787934896 (this page in markdown: same URL + `.md`)
- Developer: [anthony saunders](https://appshunter.io/developer/460303742)
- Category: Music, Music, Entertainment
- Price: $2.99 with in-app purchases
- Rating: 3.63/5 from 8 App Store ratings · 30 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 30 MB
- Languages: English, Chinese
- Released: 2014-01-07
- Data updated: 2026-06-10
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/midisequencer/id787934896/reviews.md

## What is midiSequencer?

Already have a great set of IOS Synth apps but want to get some unique sounds & rhythms from them? 

MidiSequencer is a step sequencer designed to let you play with melodic tunes on the fly to create exotic sounds from your favourite IOS and hardware synths. 

** Reworked as Universal device (iPhone 4s,5,6,6+ and all iPads) **

Comprehensive manual available for view http://www.amssoftware.org/manual/midiSequencerManual.pdf

 With step sequencing, up to 16 midi notes can be defined and played back interactively using buttons, sliders and swipes. It therefore lends itself to more experimental style of music making as steps can have all manner of variations - pitch, velocity, length, midi channel, swing, % probability(note or velocity) and musical ornaments such as ratchetting and mordents.

With the addition of chords, each step can also send out up to 128 note chords. You can create your own chords by using a on-screen keyboard or pick common ones such as the dim7.

Midi FX are now included included echo, filters, layering and note rotation....

MidiSequencer also offers extreme tempos (from 1 to 1020BPM) and a variety of Master/Slave combinations utilising midi clocks.


SPECIAL NOTES : 
1) iOS 8 or greater only so iPad 1 not suported
2) Iphone 4 upwards only
3) This app makes no sound (although it can send/receive midi to coreMidi apps you have installed on your iPad). 
4) To communicate with external midi equipment you will need a suitable iPad midi interface unless you use the Midi Network sessions over wifi.
5) 64 bit compliant

## Key features

- Step sequencing with up to 16 MIDI notes per step
- Adjustable pitch, velocity, length, and MIDI channel
- Swing and probability for notes and velocity
- Musical ornaments like ratchetting and mordents
- Chord creation and playback (up to 128 notes)
- Included MIDI FX (echo, filters, layering, rotation)
- Extreme tempo control (1-1020 BPM)

## Pricing and in-app purchases

Base price: $2.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Step chords and added notes | Free | one-time |
| midi effects | Free | one-time |


## Recent user reviews (10 of 30)

All indexed reviews: https://appshunter.io/ios/app/midisequencer/id787934896/reviews.md

### 1/5 — Should be a zero rating

*2022-08-24*

App doesn’t function if it even starts. Crashes most times when I try to use it. Stay away and save your 3 dollars.

### 1/5 — Needs updating

*2020-09-28*

Just doesn’t work anymore, shouldn’t be on App Store if it’s not being updated anymore. Don’t waist your money.

### 1/5 — App not showing in Audiobus

*2020-04-01*

This app is not showing in Audiobus or AUM.  Not sure how it can be used.

### 5/5 — Awesome for my setup

*2019-05-14*

I have few mono synths and a puc+ (Bluetooth midi device)
And this sequencer is so much fun! I set the velocity to open the cutoff on my nyborg12 synth and it’s an instant Depeche Mode...
For $2.99 it’s great.

### 4/5 — Complex, fun, frustrating

*2016-11-29*

Grabbed this on sale 'cause it looked like fun, and it is fun. But it would be a whole lot better if there was some kind of tutorial. There is a manual available via the devs website. But a quick start option would be helpful. I have no idea what I'm doing. Also, why doesn't the app quit when told to? It has to be manually swiped from memory.

Nic

### 5/5 — Great sequencer for iOS

*2016-08-18*

Tony has poured a lot of love into this sequencer. From visual realism to functionality. Extremely responsive dev. Great app. Recommended!

### 4/5 — Awesome sequencer! Needs UI makeover.

*2016-07-24*

Maybe if I were on something bigger than an iPad Mini I would find this sequencer easy to use. It certainly has enough features to keep a music geek busy for a very long time. But the interface looks to be made for a very large desktop computer monitor: shadows and highlights on tiny buttons and even a script font for some of the function labels. Clearly someone labored painstakingly over these details.

Unfortunately, I cannot use it without constant zooming and scrolling and zooming and scrolling, which completely kills the creative flow for me. There is a lot packed into the screen; the UI really needs to be redone in a more minimal style to make it work as a mobile app. I'm not at all a fan of extreme minimalism as a UI style--please keep the colors! Please don't give me orange or light gray on white!--but add a leavening of flatness and sans-serif fonts and I'll put that fifth star up.

### 5/5 — tremendous!

*2016-06-14*

a time machine to 1974! but with more features than they ever dreamed of. an extremely well built piece of software. more please!

### 3/5 — Pretty damned good.

*2016-04-04*

Used with external synths like iM1 or iSEM it works beautifully. The only sequencer which trumps this (there are a few which are in the same league) is Cream Mobile. Which is the best as a VST as well. Apparently.

### 5/5 — Powerful Midi tool - Highly recommended

*2016-03-13*

I didn't know how much you could do in 16 steps. 1 step alone can be a chord, strum or long arpeggio or just a good old mono note. Repeats, note probability and velocity variation percentages also. 16 step clips can be instantly loaded on the fly opening up the possibility of live use. An excellent sequencer.

## Frequently asked questions about midiSequencer

### What does midiSequencer do?

midiSequencer is a step sequencer designed to help you create unique sounds and rhythms from your iOS and hardware synthesizers. It allows for on-the-fly melodic tune creation with detailed control over each step's parameters, enabling experimental music making.

### What are the key features of midiSequencer?

Key features include step sequencing with extensive parameter control (pitch, velocity, length, MIDI channel, swing, probability), chord creation, built-in MIDI FX like echo and filters, and extreme tempo control. It also supports musical ornaments for more complex patterns.

### Does midiSequencer make sound on its own?

No, this app makes no sound on its own. It functions as a controller, sending MIDI data to other CoreMIDI-compatible apps or external hardware synthesizers. You will need separate synth apps or hardware to produce sound.

### What devices and iOS versions are supported?

The app is universal and supports iPhone 4s and later, and all iPads. It requires iOS 8 or greater, meaning iPad 1 is not supported. To connect to external MIDI equipment, you may need a suitable iPad MIDI interface or use MIDI Network sessions over Wi-Fi.

### How can I create chords with midiSequencer?

You can create your own chords using an on-screen keyboard or select from common chord types. Each step can send out up to 128-note chords, adding a layer of harmonic complexity to your sequences.

## Version history (last 5 releases)

### 1.14 — 2017-07-10

This app has been updated by Apple to display the Apple Watch app icon.

Fixed IPad Pro 12.9 FX buttons not working
Fixed 14bit NRPN & RPN not sending 2nd byte if 0 value
Made both IAP (FX & Chords) free

### 1.13 — 2015-12-10

Major Changes:
. Fixed IOS 7 crash on startup - sorry for delay!
. Added iPhone zoom top/full/bottom now use full width (3 buttons now replacing + before)
. Updated to latest AB library 2.3.1 (28th Nov 15)
. Fixed IAP MidiFx was showing chords instead of MidiFX on main menu - this worked if going through skip button panel
. Fixed midiLearn not saving mappings
. Added Chord strum tempo sync - chords will arpeggiate up or down using tempo divisions (so 1/1=1 note per step interval)
. Extensive rewrite of midi input to sequencer &/or output
. Removed Options Output latency - use per device output latency instead to delay midi
Minor Changes:
. Fixed Limits - lower was fixing at F#8
. Fixed Tempo slider showing when Slave mode and exit panels that cover up LHS
. Optimised floating messages for all devices
. SkipButton - Rotator fx was showing as Ostinato
. Fixed midi Thru playing two note on's if fx
. Fix fx Rotator playing loud - was not capping vel to 127 and giving strange results
. Rotator Fx now saves/loads settings even if transpose or harmony off
. Rotator Fx button in FxPanel was getting lost when swapping fx in slots
. Limiter - MidiIn & randomise note or channel in range - disabled now for midiIn - otherwise can't matchup On & Off midi messages
. Filter Fx now clearly labeled as rejecting notes/velocity/channels
. Moving note slider was showing non-scale notes in label unless Options Scale after Transpose was set - should always show only scale notes

### 1.12 — 2015-11-20

Complete rework of all graphics to allow retina iPhone 4,5,6,6+ screen resolutions - including zoom feature (+ button on extreme left)
Retina enabled.
Note: IOS7 users please try the Lite version first.
Now contains code to be fully multi-threaded - needed for new upcomming clip sequencer app which can run 20 instances.
New midiFX - Rotator - a chord with rotating middle note
Latest Audiobus sdk 2.2.2
Improved touch
Transpose now ranges from -24 to +24
Set the Start & End of sequence using [ & ] buttons
Improved midiFx blurred graphics
Moved Shift L/R to reset menu
Midi Fx - Echo - now allows 2 decimal places in gain (0.00 to 2.00)
Double tap tempo slider brings up panel to enter integer tempo (like Transpose slider)
Added new hardware midi CC mappings : moog Sub 37, moog Sub Phatty and Analog 4. 
Increased bank snapshots to 100 (from 40). Added new < button on performance panel to scroll backwards
 
Bug Fixes
  Was not playing first step on SLAVE start
  Was not able to save to slot 11
  Was not resetting %probability to 100% when reset all done
  MidiFx - Echo - fixed issue with echo note off - only apparent on monosynths
  Removed WIST - it wasn't working anyway
  OMAC disabled in IOS9 - awaiting fix from MidiBus as IOS9 security limits access to other apps.
  Transpose only loaded from snapshot if Include Controls enabled - was always doing this.

### 1.11 — 2015-01-06

. Setting to enable load last bank/snapshot without any key presses.
. Adding filename to pf Panel saveBank button
. Fixed output latency set to 5000ms on initial install - now set to 120ms
. linked controls are now per type of control (notes, velocity, etc)
. lock controls - useful for audition & stopping playback mistakes.
. compressed graphics footprint by 20%
. fixed odd coloured green key mask for chords
. improved performance whilst in background
. Improved performance when IAA/AB host is disconnected/killed.
. Can now divide output clock by tempo (e.g. 1/2 or 8/1) in options    panel - saved in snapshot
. increased midi echo fx tempo to include slower 8/1,16/1 & 32/1 tempo sync
. fixed bug with CCs not using values on Cycle reset.

### 1.10 — 2014-12-09

NOTE: For new installs : Reset output latency to 0ms in Options Panel, otherwise will hear an 8 step delay!

Ability to filter Input/Output device - filter notes, CCs and/or FX
Use MidiSequencer to add midi fx to midi note input.
MidiFx improvements & Ostinato.
Per step %probability, swing, humanise(note or vel)
latest Audiobus sdk 2.1.5
Various bug fixes & performance enhancements

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## More apps by anthony saunders

- [Quantum Sequencer](https://appshunter.io/ios/app/quantum-sequencer/id1207932898)
- [Midi Echo AU](https://appshunter.io/ios/app/midi-echo-au/id1422324067)
- [Polythemus AU](https://appshunter.io/ios/app/polythemus-au/id1439815017)
- [Photon AU](https://appshunter.io/ios/app/photon-au/id1441542979)
- [Skirmish 1944](https://appshunter.io/ios/app/skirmish-1944/id1597985916)

All apps by anthony saunders: https://appshunter.io/developer/460303742

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*