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S-2

S-2

12-voice polysynth

4 ratings
1 review
🎬 Entertainment
🎵 Music
Free

Details

  • Released
  • Updated
  • May 18, 2026
  • August 8, 2026

Features

Developer

Mathias Kirkerød
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iphone
ipad
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About

This app is a polyphonic synthesizer that works with specific hardware. It offers a variety of sound engines, filters, and effects for creating unique audio textures. Advanced modulation options and a flexible routing system allow for deep sound design.

✓Dual engine slots per voice
✓Multiple sound flavors (analog, wavetable, FM, speech)
✓Classic and Modern filter modes
✓Advanced FX rack
✓Two free-routing LFOs
✓Unified mod matrix
✓Standalone, AU, and AUv3 formats
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What's New in S

2.1.1

August 8, 2026

NEW - OUT panel: output meter, gain-reduction meter and a master compressor. - Four new effects in the Extended rack: - Trance Gate - Ring Mod - Comb Resonator - Reverse Delay. - See your sound - The LFO draws its real output as it runs, - The Voice panel has a SCOPE tab with a waveform and spectrum - The envelopes show a dot riding the curve as each note plays. - Tap tempo: double-tap the BPM dial and tap along, or type a number. - Knob pickup for hardware: choose Jump, Catch or Glide. - Tempo sync updated - Signal Flow page - Save your own presets, and delete the ones you don't want, from the preset menu. SOUND - All 41 engines are level-matched. - Envelope knobs are far more precise at short times - Sampled instruments (Grand Piano, Violin, Alto Sax) retouched - Factory patches rebalanced - Reverb pre-delay works as intended INTERFACE - Redesigned dials: clean rings - Unusable dials disabled - Tap any routing label to see which knob it drives. - More smoothness in animations

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User reviews

Most RecentHighest RatedLowest Rated

The master level issue

I want to explore it more but how do I tame the highly random loudness of the patches if I can’t set the main output so that its max stays permanently locked and does not keep changing with every patch? Sure, there is some benefit to being able to save it to the patch, but there should be one master level that controls the main output of the app. Currently many patches clip the input of Ableton when iPad is connected as a source over USB and the level has to be adjusted every time. It does not happen with other apps. Please fix it.
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FAQ

What is S-2?

S-2 is a polyphonic synthesizer application designed to work with the Roland AIRA Compact S-1 hardware. It offers a wide range of sound engines, filters, and effects for music creation.

Does S-2 work on iPhone and iPad?

Yes, S-2 is available as a standalone application for iOS and supports AUv3 plugin formats for iPad and iPhone, compatible with hosts like GarageBand and Cubasis.

What sound engines are available in S-2?

S-2 features two parallel engine slots per voice, offering sound flavors such as classic analog (saw, square, sub, noise, pulse-width), wavetable, FM, speech, chord, and plucked string.

What filters and effects does S-2 offer?

The app includes a classic ladder filter with Delay, Chorus, and Reverb, as well as a modern multi-mode SVF (LP/BP/HP) followed by a 3-slot Advanced FX rack with Bitcrusher, Drive, Flanger, Phaser, Auto-Filter, Tape Delay, Plate Reverb, and Chorus.

How does S-2 handle modulation?

S-2 provides two free-routing LFOs with clock-sync options, a dedicated filter envelope with two destination slots, and a unified mod matrix for visualizing all routings. Knobs can be assigned in Learn mode.

Is S-2 compatible with desktop DAWs?

S-2 can be used as an Audio Unit (AU) plugin for desktop DAWs like Logic Pro, allowing integration into professional music production workflows.

How often is S-2 updated?

The latest version of S-2 is 2.1.1, which was last updated on August 8, 2026. This indicates a recent update cycle for the application.

Does S-2 have ads?

No, S-2 does not contain advertisements. It is a free application that focuses on providing its synthesizer features without interruption.