Quantum is a performance midi sequencer which approaches music composition with an interactive creation processes - sometimes referred to as 'noodling'.
Where pattern or piano-role sequencers are good for music forms (intro/verse/chorus etc) or grid entry, Quantum's approach is built around the idea of a step being the focus - think of the step as a single note or chord written on a music sheet then add a lot of extra notation (like probability of playing or ornamentation say).
These highly detailed steps are then aligned into sequences (think melodies) that loop. You can have any length up to 64, but these can be further split into 4 sub-sequences that have their own set of sequencer parameters (like tempo, play direction, transpose etc).
To enter step parameters such as note pitch, velocity, gated length etc, 16 general faders are available which allow you to draw, drag, select copy/paste, inc/dec & link together to edit values. These are also midi learnable (midi cc or nrpn) to allow you to use control surfaces or midi controllers.
To aid you with faster control Quantum has loop actions which you can program in to carry out tasks when a sequence loops - e.g. transpose, randomise, start or load another sequence etc.
With up to 24 sequences playing Quantum introduces a mixer page allowing you to blend midi velocities. Built on the MidiSequencer engine, midi FX, devices & Controllers are now possible per sequence.
So why would Quantum be good for your setup? There are many midi enabled IOS & hardware synths that produce exotic timbres if you send them fast & varied midi controls that you just would not hear with keyboard playing or slow tempo tunes. Also, Quantum, embraces experimentation in melody creation and by copy/pasting allowing quick setup of arpeggios & counterpoint tunes that you can create & manipulate on the fly!
note : This app sends midi information - you need to use it in conjunction with any midi enabled iOS synth app (e.g. Sunrizer) to hear sounds
Updated for latest IOS device screen layouts & IOS 14
Latest Midibus, Audiobus & Ableton Link libraries
Midi In Prog Chg now loads selected sequence version (delayed if cycle on) - eg $C0 02 loads version 2
Device input panels allow blocking of Prog Chg messages
Ratings and Reviews
This app goes deep, deep deep. The manuals well written. Ace!
This app will infect my dreams with crazy ideas waking me up in a cold sweat at 4am in the morning desperately reaching for my ipad to try out some never thought of madness that will start a new genre of music and will have its own weird and wonderful dance associated with it. The future will be shaped by this app, and it will be a good future.
Congratulations, Tony, I think youve made a classic
Developer Response ,
Great thats what I wanted from this app also - the ability to tryout crazy rhythms & create patterns on the fly But 24 part harmony would blow many minds, best to tame a few melodies at a time!
Has its problems
As a sequencer the ideas in it are good - ratcheting etc. It works fine controlling an iOS synth.
The problems start when trying to get it to work with a DAW on a computer. The Ableton Link feature is implemented in an incredibly confused and confusing way and even when the app claims to be running using Link it sends no MIDI to anything, anywhere. Live 10’s transport doesn’t work when using Quantum with Link either, so even if Quantum did send MIDI there’s no way to record it.
All the other ways to connect MIDI from an iPad to a Mac (cable, wi-fi etc.) don’t seem to work either and usually result in Live’s transport not working for playback or record.
What “help” there is is incomplete and useless for problem solving. Several hours searching on line turn up other people with similar problems but no answers that actually work.
A waste of money? No, unless you want to use it with a DAW or hardware synths. Which unfortunately I do. A pity because on the face of things Quantum is pretty much exactly what a touch-interface step sequencer should be - if only it actually worked properly.
Best sequencer on ios , bar none
There is nothing else that comes even close to the features in this sequencer. Take a look at the intro video on you tube, I guarantee you click buy now before it's halfway through...... I did, and am not disappointed. If you own a squarp pyramid... Throw it away you won't need it anymore.
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- anthony saunders
- 201.5 MB
- Requires iOS 10.3 or later.
- Requires iPadOS 10.3 or later.
- iPod touch
- Requires iOS 10.3 or later.
English, Simplified Chinese
- Age Rating
- © anthony saunders
Up to six family members will be able to use this app with Family Sharing enabled.