- Featured in Apple's staff favorites!
- Reviewed in Computer Music magazine and received a 9/10!


Jasuto is the worlds first (and most powerful) modular synthesizer for the iDevices.

Jasuto allows you to visually construct your own synths/effects, and use them to make sequences all on your device! With the addition of a fully-featured sampler you can now record/resample/edit, and even create entirely new samples by drawing right in the app.

Jasuto uses the relative position of nodes and their connections to control the sound. So the scene not only represents the synthesis structure, but also a custom multi-touch control surface. Motion can be recorded per node giving you rich, flexible automation.

Connections can be created automatically by simply dragging nodes around, or manually. Each wire can be double-tapped to allow even more control of each connection.

Jasuto comes installed with 75+ modules as well as 200+ pre-loaded scenes and samples. Each of the modules have been hand-optimized for your device's CPU, allowing you to create extremely complex scenes.


- Anti-aliased oscillators with hard-sync, FM, PWM, PM
- Analog style filters (ap, lp, hp, bp, ladder emulation)
- Signal control (compressor, limiter, gate, follower)
- Zoomable sampler editor with several loop modes (normal, 1 shot, ping, granular)
- ADSR envelope editor
- Multipage/octave sequencer
- Tape style analog delay
- Reverb, phaser, several waveshapers
- Resample/record the current playback
- Audio copy via the pasteboard
- Incoming OSC and MIDI for notes and CC's
- Audiobus support (input, effect & output source)
- Completely compatible with iOS7
- Updated UI graphics
- Universal device and Retina support
- A shiny new manual
- Added background audio support
- Low latency audio (256 samples)
- Sample sharing through SoundCloud
- Dropbox syncing of samples/scenes
- High Fidelity (Hi-Fi) Audio


What's New

Version 1.7.0

1) Updated Audiobus
2) Fixed MIDI CC saving
3) Soloing now works properly

Ratings and Reviews

3.5 out of 5

15 Ratings

15 Ratings

Deep and intuitive

V. Zocko

This is my favorite app right now. It's very fun to play with, but also seriously capable. I'm still sort of green when it comes to electronic music production and I still have a lot to learn, but using this app is helping me understand a lot of features of the other programs I've been using by having the same tools in an intuitive interface. It's also made some of my other apps a bit redundant, since I can basically create more tweakable versions of them within Jasuto. It's great wether trying to achieve something specific with meticulous detail, or just experimenting with the nodes to see what happens. I only wish I wasn't such a late comer, so I could have grabbed the VST version, which is apparently no longer available. Jasuto is wonderful. Get it.

Highly creative and fascinating modular synth

Wild Type

I'm using version 1.6 on iPhone 5s and IOS 8.3. It's a great synth app, very flexible and capable of creating a wide range of sounds and soundscapes. It gets 4 stars and not 5 due some glitches. First, in the File menu, there is no delete command, and the Delete button in the File Open screen doesn't actually delete the selected file. Second, in the Node Edit screen, double tapping the value field switches it to Num mode -- tapping it again to edit the value causes the app to crash. Finally, there is no way to enter or edit information about the file. The Information button doesn't work and for some reason the app automatically inserts descriptions from files that come with the app. I hope these issues get fixed.

The best


Jasuto is easily the best balance of raw power, flexibility and ease of use to be found in iOS land. I'm sure it's very difficult to remove all bugs from software this complex, but in the current iteration Chris has done a great job of getting rid of all the glaring usability issues that plagued earlier versions, and this app now fulfills all the promise that was there in 2009.

While not for the faint of heart or the rompler-lover, Jasuto is a serious tool for noisemaking. It's an invaluable learning aid for those thinking of getting into hardware modular; most techniques used in Jasuto are directly applicable to that realm. Still great after you own hardware as a sketchpad for your patching ideas, or just to keep up your chops wherever you're at.

To get such limitless power in hardware...I'm not sure $50k worth of Eurorack would be able to match this app running on any iPad or iPhone you can buy right now. In a couple years it might take $100k. Seriously. You want 30 oscillators? 14 filters? 6 different delay lines? A dozen envelopes? No problem!

Get out your wallet and keep funding this guy, because I want more! More!


Christopher Wolfe
50.7 MB
Requires iOS 5.1 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2014 Christopher Wolfe. All rights reserved.
In-App Purchases
  1. Morph module $0.99
  2. Space Module $0.99
  3. HIFI Mode $4.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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