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Sounds great but need the ability to save multiple user sounds. Also the sheets don’t load inside of AUM.
Free
In-App Purchases
About
This app is a unique musical instrument played by touch. It uses a visual interface where your finger's position determines the sound, offering a novel way to create drones, textures, and pads. It also functions as an AUv3 plugin for use in other music production apps.
✓Touch-based sound generation
✓Perceptual distance mapping
✓Eleven distinct sound sheets
✓MIDI input and ribbon controller
✓AUv3 plugin support
✓Recording functionality (Pro)
✓Customizable sound sheets (Pro)
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What's New in Contour
1.0
August 18, 2026
1
In-App Purchases
$6.99
Contour Pro
All 11 sheets, recording, envelope, compose.
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Developer apps
FAQ
What is Contour?
Contour is a unique musical instrument app that allows you to create ambient sounds, drones, and textures by interacting with a visual interface. Your finger's position on the screen directly influences the sound produced, offering an intuitive and expressive playing experience.
What sound sheets are available in Contour?
Contour offers eleven distinct sound sheets, each with a unique set of four corners designed to produce different sonic characteristics. These sheets are grouped by qualities like brightness, contrast, breathiness, depth, and range, named after Taiwanese mountain traverses.
Can I use Contour with a MIDI keyboard?
Yes, Contour supports MIDI input, allowing you to play it from an external keyboard. The ribbon underneath the main interface also serves as a pitch controller, and the contact patch of your finger acts as a dynamic control.
Is Contour available as a plugin?
Yes, Contour is also available as an AUv3 plugin. It can be used within hosts like AUM, GarageBand, Cubasis, and Logic for iPad, with automatable parameters and session recall capabilities.
What features are included in the free version of Contour?
The free version of Contour includes three sound sheets (BEIYIDUAN, NENGGAO, and YUSHAN), the full instrument functionality including the map and ribbon, MIDI support, reverb, marks, and the AUv3 plugin. There are no time limits or account requirements.
What does Contour Pro offer?
Contour Pro is unlocked with a single purchase and provides access to all eleven sound sheets, recording capabilities directly to a file, an envelope panel for attack, decay, sustain, and release, and the ability to compose your own sheets from the library.
What are the system requirements for Contour?
Contour requires iOS 16 or later and is compatible with both iPhone and iPad devices. The app was last updated on August 18, 2026.
How does Contour compare to other synthesizers?
Contour distinguishes itself through its unique touch-based playing interface and its focus on ambient soundscapes and textures. Unlike traditional synthesizers, it uses a visual map where perceptual distance directly translates to sonic change, offering a novel approach to sound design.