# Harmonitron — Harmonic tremolo effect

> Harmonic tremolo audio effect with adjustable voice, movement, and stereo spread. (iPhone/iPad app by Konstantin Torsten Schutz.)

- Source: https://appshunter.io/ios/app/harmonitron/id6790326853 (this page in markdown: same URL + `.md`)
- Developer: [Konstantin Torsten Schutz](https://appshunter.io/developer/6778600016)
- Category: Music, Entertainment
- Price: $2.99
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: American English
- Released: 2026-07-21
- Data updated: 2026-08-07
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/harmonitron/id6790326853/reviews.md

## What is Harmonitron?

Harmonitron is a harmonic tremolo. The rich, swirling amp "vibrato" made famous by early-1960s brownface amplifiers.

A normal tremolo just pulses your volume up and down. A harmonic tremolo goes deeper: it splits your sound into a low band and a high band, then sweeps them in OPPOSITE phase. As the lows swell, the highs dip and back again. That contrary motion is what gives Harmonitron its lush, watery, almost phaser-like character that an ordinary tremolo can't reach.

Turn the Voice control and the effect morphs smoothly from a classic in-phase tremolo all the way to a full harmonic swirl. Drop it on guitars, keys, synths, pads, drums, or a whole mix. Standalone, or as an Audio Unit (AUv3) effect inside GarageBand, AUM, Logic, and other hosts.

THE SOUND
• True harmonic tremolo: anti-phase modulation of a low and high band
• Voice: morph continuously from classic tremolo to full harmonic swirl
• Split & Tilt: place the crossover and balance the two bands
• Tube Drive and tone shaping for warmth and grit

MOVEMENT
• Rate from a slow tide to a fast flutter, shown in BPM
• LFO Shape: sine, triangle, square, and ramp with adjustable edge Slope
• Tempo Sync that locks to your project and lands on the beat, with musical note divisions from 1/1 to 1/32 (dotted and triplet)
• Stereo Spread for auto-pan and rotary-style width

HANDS-ON
• A living hero orb whose two halves breathe in opposite phase — drag it to set Depth, tap to bypass
• Grouped, color-coded controls: Motion, Sync, Harmonic, Stereo, Drive, Output
• Factory presets: Brownface, Rotary Swirl, Slow Tide, Sync Chop, Wide Harmonic and more — plus your own saved presets

PLUGIN & STANDALONE
• Full AUv3 audio-effect support with host presets and parameter automation
• Runs on iPhone, iPad, and Mac
• Standalone mode with a built-in demo pad, live microphone input, or import a song and export the processed result

## Key features

- True harmonic tremolo with anti-phase modulation
- Voice control for morphing between classic and harmonic tremolo
- Split & Tilt for band crossover and balance
- Tube Drive and tone shaping
- Adjustable Rate and LFO Shapes
- Tempo Sync with musical note divisions
- Stereo Spread for auto-pan and width


## Frequently asked questions about Harmonitron

### What makes Harmonitron's tremolo different from a standard tremolo?

Harmonitron creates a harmonic tremolo by splitting your sound into low and high frequency bands and modulating them in opposite phases. A standard tremolo typically only pulses the volume up and down.

### Can Harmonitron be used with other music apps?

Yes, Harmonitron fully supports AUv3 audio effects. It can be used inside hosts like GarageBand, AUM, and Logic on iPhone, iPad, and Mac.

### What instruments can Harmonitron be used on?

Harmonitron is versatile and can be applied to guitars, keys, synths, pads, drums, or even an entire mix. Its unique sound can add character to a wide range of audio sources.

### How does the 'Voice' control work in Harmonitron?

The Voice control allows you to smoothly morph the effect from a classic in-phase tremolo all the way to a full harmonic swirl. This provides a wide range of tonal possibilities.

### Does Harmonitron have ads?

No, Harmonitron does not contain advertisements. It is a paid application.

### What is the price of Harmonitron?

Harmonitron is available for a one-time purchase of $2.99.

### What devices does Harmonitron support?

Harmonitron runs on iPhone, iPad, and Mac devices. It is compatible with iOS, iPadOS, and macOS.

### How often is Harmonitron updated?

Harmonitron was last updated on July 21, 2026, with version 1.0. Information on future update frequency is not provided.

## Version history (last 1 release)

### 1.0 — 2026-07-21

No release notes.

## More apps by Konstantin Torsten Schutz

- [Omnisound](https://appshunter.io/ios/app/omnisound/id6778600014)
- [Lofi inator](https://appshunter.io/ios/app/lofi-inator/id6787633514)
- [Pruina](https://appshunter.io/ios/app/pruina/id6793593593)

All apps by Konstantin Torsten Schutz: https://appshunter.io/developer/6778600016

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-07.*