Additive Synth
Spectral Morphing Synthesizer
$8.99
iPad
WHAT IT IS
Additive is a synthesizer that builds each sound up from harmonics instead of using a filter to cut it down. You can set every harmonic individually, then shape how it moves over time: some can pulse together while others drift, shimmer, or move in the opposite direction. This gives you control over every part of the spectrum and a large range of sounds, from shimmering pads and bell-like plucks to deep resonant basses. Start with a preset, generate a sound with Random, or build your own from the ground up.
WHAT IT DOES
* Harmonic bank: set up to 50 harmonic bands by drawing them, picking a shape, or generating a random spectrum. Every band is yours to change.
* Custom movement for every harmonic: give each band its own modulation depth, phase, and rate, so the movement happens inside the sound.
* Cutoff and resonance, uncoupled: Bands and Slope set the cutoff, while Bulk is a resonant peak you can place anywhere in the spectrum, independent of where cutoff sits.
* Morph: draw two spectra and move between them by hand, with an LFO, or with an envelope. A note can begin as one sound and become another.
* Modulation: four LFOs with nine shapes, including ones you can draw yourself, plus tempo sync and four envelopes.
* Voicing: Character, Detune, Chorus, Drive, and Stereo take the harmonics from pure sine waves to analog-leaning, distorted, or otherworldly.
* Play the spectrum: assign brightness, movement, Morph, or anything else to the XY pad and the Z slider, and explore the movement inside the spectrum yourself.
* Presets and Random: more than 100 presets cover basses, pads, textures, plucks, leads, bells, organs, keys, brass, and drones. Random generates a whole new sound, and you can adjust every detail to make it your own.
* FX: delay, reverb, drive, compression, and EQ are built in, so your sounds leave Additive finished.
* AUv3 and standalone: load Additive as an instrument in your host, or play it directly in the app with the on-screen keyboard and arp.
* Four themes: Hardware, Cobalt, Dark, and Light.
REQUIREMENTS
* iPad with iPadOS 15 or later
* An AUv3 host for the plugin, for example AUM (the standalone app needs none)
Ratings & Reviews
- Expanded the arpeggiator with slower rates, a Chord shape, an Octave chord option and improved Latch.
- Reduced CPU use with repeated notes and added a Save CPU quality setting.
- Smoother sound when adjusting effects and voice controls.
- Added Free Bulk mode in Settings for more sound design possibilities.
- Improved delay tone and more accurate host-synced LFO timing.
- Reorganized the Settings page.
- Clearer harmonic bank displays.
- Updated several factory presets.
The developer, Snorkel Audio, Inh. Michael Kaisser, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Snorkel Audio, Inh. Michael Kaisser
- Size
- 13.6 MB
- Category
- Music
- Compatibility
Requires iPadOS 15.0 or later.
- iPad
Requires iPadOS 15.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPad
- Age Rating
4+
- 4+
- Copyright
- © 2026 Snorkel Audio
