Atom | Piano Roll 2 4+

Sequencer and clip launcher

Victor Porof

Designed for iPad

    • 4.7 • 75 Ratings
    • $19.99



Now with MPE, sustain, pitch, mod, automation recording, and 16 channels in a single instance!

Reached #1 on the App Store in the Top Paid Music App Category.

The most advanced AUv3 MIDI note editor, modular sequencer and clip launcher on iOS.

- This plugin does not run as a standalone app and requires a compatible host.
- MIDI is not sound. To make sound you'll have to feed the MIDI into a synthesizer or instrument app. Bring your own synths!
- Hardware integration with controllers requires iCloud Drive.

- Special integration with hosts: AUM and Drambo.
- Tested hosts: ApeMatrix, Audiobus, BeatMaker, Cubasis, MTS, Zenbeats. Limited support by NanoStudio 2. Not supported by GarageBand.

Build live sets for clip launching, or an entire track with unlimited length. Play the whole sequence, or adjust the loop markers to iterate over a single section. Step input, or record as played, all with perfect timing accuracy.

Write your own code, share it with the community! You can control hardware devices, adding support for new controllers or completely changing the behavior of existing ones. Build your own styling with custom layouts and themes. Change colors, fonts, sizes… make it yours!

Piano Roll 2 takes all the features you love about the first installment, and expands them into an entirely new breed of modular sequencer and clip launcher, unparalleled in flexibility and depth on iOS. We redesigned it from the ground up to incorporate a plethora of new features and workflows.
- It's a sequencer that augments the capabilities of your host or DAW.
- It's a composition tool that helps you to write beautiful melodies and complex polyrhythmic patterns.
- It's a clip launcher that integrates seamlessly with supported hardware controllers.
- It's a scripting playground that lets you customize your workflow with code.
- It's a swiss-army knife of possibilities when working with MIDI.

Here are just some of the many use cases this modular architecture supports:
- Build live sets for clip launching.
- Compose patterns with touch, Apple Trackpad and Apple Pencil, or use the step input mode to write melodies step-by-step.
- Capture performances in real time and export your patterns as MIDI files.
- Import and edit MIDI files created in other apps, or from commercial packs.
- Record generated MIDI of other plugins or sequencers.
- Write harmonies and counterpoint melodies by superimposing the patterns of other Atoms as ghost lanes.
- Construct complex polyrhythms by taking advantage of custom time signatures and grid fractions.
- Sequence the sequencers for full modular mayhem.

What’s New

Version 2.0.10

- Infinite undo. Edit fearlessly.
- Improved channel targeting: long pressing a channel’s show/lock buttons will now toggle them exclusively, for easier channel switching.
- Improved interplay between user configurations and custom styles: now always using larger fonts when the selected configuration demands them. Configurations (such as Larger Controls and Sausage Fingers) support an "includedStyle" field which always applies the specified stylesheet. In effect, you can now use "Larger Controls" with "Larger Fonts" in combination with "MIDI Channel Colors".
- Added a "MIDI Note Data" example style that shows all note info, including the note’s octave, value, velocity etc.

Note: When iOS notifies Atom of system-wide memory pressure, very old undo/redo history will be discarded.

Ratings and Reviews

4.7 out of 5
75 Ratings

75 Ratings

Enrique Raphaël Page Pérez ,

The most amazing timeline AU available.

Atom 2 is wonderful. It is leagues ahead of the competition and by that I do mean even most DAW midi editor pale in comparison.

There’s only one serious contender against ATOM 2, and that is Helium. Both are amazing apps, and at the moment I use each for its own strength.

What i’d like to see coming to ATOM 2? Midi CC curves. Maybe this is available already but I haven’t found a way to “SEE” my midi CC data. It can record it, but it doesn’t seem to display it anywhere.

Helium has a sort of curve editor which works wonderfully for automation, whether it is recorded or drawn the thing works perfectly. This is probably the one thing that ATOM 2 is missing.

Also, as a side question, is there such a thing as an “undo last recording”? That is one thing I have done issue with - ATOM 2 can Undo so many levels, but as far as I can tell this has to happen note by note - it would be great if we could maybe keep undo pressed to undo the whole last recording, sometimes I have to press undo like 30 times or simply rely on selecting it all and deleting it, but it would be better if an undo option for the whole last recording was available.

Anyway, ATOM 2 forever, and if CC editing doesn’t come around then I’ll just use Helium for CCs... but hopefully in the future I can have it all in ATOM :).

Developer Response ,

EDIT: Multi-channel support, automation, and MPE recording are all now available with the latest update.

juanthedon888 ,

Amazing midi editor

This app makes editing on the piano roll fun. Ive been frustrated so many times in cubasis 3 just tapping in hi hat notes one step at a time when you can just paste it all in one swipe!

Something i would love added would be strumming. Also why was the velocity “bars”, the little velocity “legs” at the bottom of the piano roll, removed? I see atom 1 had them, it would also be cool to have them added back as a simple on/off option but also be able to hide them from view whenever toggles on. Last feature i would love is to be able to paste steps through different notes instead of having all the pasted steps follow once you move up and down a note, that is a small feature i would only use for hi hat rolls for rap beats so its not a big deal.

This midi editor is already far better then anything we have on ipad daws with NanoStudio 2 being second so thanks again for this awesome midi editor!

a.shoja ,

Great Solution for Sketching at the Piano

First, I must say that I’m continually impressed how well-implemented this app is. I think it’s the best there is, but there are a few thing I hope are improved. So I hope the app continues to grow and become even better.

Here is one of the key benefits of this app to me. I have my digital piano away from my computer, and only a small MIDI controller at my desk. So I wanted a good solution for quickly jotting down ideas on my iPad, either on the screen or using my piano.

I understand that this isn’t the main use case of this app, but it can work with a few limitations. I think this is an interesting usage scenario to explore, and grow the user base even further.

Here are a few suggestions that would make the app better suited for that:
1- Lack of support for chord entry in Step Input mode is a bummer. I think this is critical for sketching harmonic ideas quickly.
2- Adding standalone support with only a subset of the functionality enabled will eliminate the overhead of setting up an AUM session just to enter a few notes on a piano roll and save the idea as a clip for later use. It would be really helpful to have the ability to creat clips in the clipboard in a standalone mode.

App Privacy

The developer, Victor Porof, 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 Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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