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By anthony saunders

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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

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.

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

1) iOS 7 or greater only (Audiobus now requires this), 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.

What's New in Version 1.13

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


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iPad Screenshot 1

Customer Reviews


Classic step sequencing with all the bells and whistles you could dream of. That it now works also on iPhone is a grand step forward for the mobile electronic musician and makes for a lot of experimental fun.

Can't get full screen on 6s

There are 3 screen size choices, none of which fills the whole app in the screen on a 6s. Buttons are extremely tiny which makes it difficult to use. This should have been for iPad only, I can't see using it at all always toggling screens where you either get a half screen of the full app(look at the picture), the top part, or the bottom. I may have well tossed my money out the window. I rarely give negative reviews, but this is ridiculous.

Amazing. A must own.

There's almost too much awesome in this app. It's very easy to just noodle for ever. Though k think that was one of the intentions.

The chord IAP is definitely worth it. Particularly with the brilliant Strum effects (set a chord and then set how it will be drawn out over time. Can do a quick 'strum' as the name would imply but can also spread the notes out for over a measure depending on the interval you set.

I find the effects setup sort of confusing but otherwise most everything is pretty straight forward; which is amazing considering just how much sequencer is packed into this app.

View in iTunes
This app is designed for both iPhone and iPad
  • $5.99
  • Category: Music
  • Updated:
  • Version: 1.13
  • Size: 31.7 MB
  • Languages: English, Simplified Chinese
  • Seller:

Compatibility: Requires iOS 7.1 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
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Top In-App Purchases

  1. Step chords and added notes$1.99
  2. midi effects$1.99