# 1981 FM: 80s Track Generator — Chaos-driven 80s track writer > AI-driven 80s track generator using chaos math for unique musical compositions. (iPhone/iPad app by Soft Brew Mobile.) - Source: https://appshunter.io/ios/app/1981-fm-80s-track-generator/id6805325447 (this page in markdown: same URL + `.md`) - Developer: [Soft Brew Mobile](https://appshunter.io/developer/561703410) - Category: Music, Utilities - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 15.0 · 13 MB - Released: 2026-09-01 - Data updated: 2026-09-06 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/1981-fm-80s-track-generator/id6805325447/reviews.md ## What is 1981 FM? 1981 FM writes complete tracks. Press generate and you get 64 bars with an intro, verses, choruses, a break and an outro, played by a four-operator FM synth. Lead, bass, arp, pad and a drum machine, through chorus, delay and reverb. Nothing is sampled. Every note is made on the fly and no two tracks come out the same. The music comes from chaos maths. A Lorenz attractor shapes the melody, rhythm and mood. A Hénon map keeps the arpeggio moving. A logistic map handles the drum fills: turn it down and they repeat every bar, turn it up and they never do. Chaos on its own is noise, so a small model filters it. It gets rewarded for consonant intervals and practises over the chord changes before it writes anything. The CHAOS / POLICY slider decides how much say each one gets. Ten styles, and they are properly different. Funk plays a 16th-note slap line with ghost notes between the backbeats. Bebop walks the bass and puts the ride in charge of the time. Bossa runs a clave. Space strips the kit back to a pulse. Every track is built from its seed. Write the seed down and you can have that exact track again, note for note, whenever you want it. Turn on RADIO and it keeps playing, picking a new key, mode, style and tempo for each track. You also get: • 10 styles, 6 modes, 12 keys, tempo and density • Four-operator FM engine, 6 algorithms, 11 presets, random patch • Five-part mixer, chorus, delay, plate reverb and filter • MIDI in, so you can play the patch you are editing • MIDI export: five tracks, one per part • Live spectrum, waveform and a view of the chaos engine at work Two Audio Units, an instrument and a MIDI processor. Each part sends on its own MIDI channel, drums on 10, so one instance can drive five instruments. The MIDI version passes your keyboard through instead of swallowing it. Both follow your host's tempo and transport. One install registers both. The app is free and nothing in it is held back. Using the Audio Units inside other apps is a one-time purchase, and each AUv3 session plays for two minutes first so you can try them properly. No account, no ads, no subscription. Works offline. ## Key features - Chaos-driven track generation - Four-operator FM synth engine - Multiple musical styles and modes - MIDI export and input - Customizable effects (chorus, delay, reverb) - Offline functionality ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | AUv3 Unlock | $2.99 | one-time | ## Frequently asked questions about 1981 FM ### What is 1981 FM? 1981 FM is a music application that generates complete, original tracks inspired by 80s music using chaotic mathematical algorithms. It features a four-operator FM synth, various effects, and allows for MIDI export. ### How does 1981 FM generate music? The app utilizes chaos mathematics, including the Lorenz attractor, Hénon map, and logistic map, to shape melody, rhythm, and mood. A filtering model ensures musicality by rewarding consonant intervals. ### Can I recreate a track in 1981 FM? Yes, every track generated by 1981 FM is built from a unique seed. By writing down this seed, you can recreate the exact same track note for note whenever you wish. ### Does 1981 FM have ads? No, 1981 FM is ad-free. The app states that it contains no advertisements, allowing for an uninterrupted music creation experience. ### Is 1981 FM available on all devices? 1981 FM is supported on iPhone, iPad, and iPod. It functions offline, making it accessible without an internet connection. ### What are the in-app purchases for 1981 FM? The core application is free. In-app purchases are required for using the Audio Units (instrument and MIDI processor) within other music production applications, with a two-minute trial period for each AUv3 session. ### How often is 1981 FM updated? The latest version of 1981 FM is 1.0.1, which was last updated on September 3, 2026. The app was initially released on September 1, 2026. ### What is the age rating for 1981 FM? 1981 FM has an age rating of 4+. This indicates it is suitable for a general audience, including children. ## Version history (last 2 releases) ### 1.0.1 — 2026-09-03 Minor bug fix and improvements. ### 1.0.0 — 2026-09-02 No release notes. ## More apps by Soft Brew Mobile - [Enemy Gates Stealth War](https://appshunter.io/ios/app/enemy-gates-stealth-war/id997725011) - [Drive Unlimited](https://appshunter.io/ios/app/drive-unlimited/id1062940454) - [No Robots No Life](https://appshunter.io/ios/app/no-robots-no-life/id6471660488) - [Strange Loop: Chaos Melody](https://appshunter.io/ios/app/strange-loop-chaos-melody/id6795408783) - [Ringo Beats: Chaos Drums](https://appshunter.io/ios/app/ringo-beats-chaos-drums/id6800236177) - [Pendulums: Chaos Melody](https://appshunter.io/ios/app/pendulums-chaos-melody/id6803192958) All apps by Soft Brew Mobile: https://appshunter.io/developer/561703410 --- *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 2026-09-06.*