# FM 304

> FM Groovebox

Canonical page: [https://chrome-stats.com/d/id1449167984](https://chrome-stats.com/d/id1449167984)

## Overview

- **ID:** `id1449167984`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Paul Betowski
- **Category:** Music
- **Rating:** 4.80 / 5 (5 ratings)
- **Version:** 1.1.5
- **Last updated:** 2026-04-28
- **First published:** 2019-04-14
- **Size:** 17 MB
- **Data as of:** 2026-09-04
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/fm-304/id1449167984)
- **Privacy policy:** [https://paulbetowski.co.uk/pp.html](https://paulbetowski.co.uk/pp.html)

## Description

FM 304 — 3x FM Synth Groovebox

FM 304 is a powerful trio of 4-operator FM synthesizers, each with its own sequencer and effects. Built for fast, hands-on sound design, every parameter is available with a one-knob-per-function layout — no menus, no digging.

Create evolving patterns, punchy sequences, and complex FM textures in seconds. Everything is on screen, ready to tweak, making it easy to move from idea to finished loop without breaking flow.

Features

• 3 independent 4-operator FM synthesizers
• Immediate one-knob-per-function control
• 3x 16-step sequencers (one per synth)
• Built-in effects: delay, reverb, chorus
• 3x LFOs for modulation
• 8 FM algorithms
• Note frequency quantisation
• 100 save slots

Designed for speed

No menu diving. No setup.
Just pure FM synthesis with everything visible and playable.

## Rankings

- #446,704 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id1449167984)