# AddStation — Additive synthesis machine > Advanced additive synthesis machine for creating complex and evolving soundscapes. (iPhone/iPad app by Harry Gohs.) - Source: https://appshunter.io/ios/app/addstation/id1500919657 (this page in markdown: same URL + `.md`) - Developer: [Harry Gohs](https://appshunter.io/developer/382428644) - Category: Music - Price: $8.99 (on sale, was $14.99) - Rating: 4.50/5 from 43 App Store ratings · 39 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 133 MB - Languages: American English - Released: 2020-08-26 - Data updated: 2026-08-30 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/addstation/id1500919657/reviews.md ## What is AddStation? The next generation of additive synthesis Additive synthesis is a sound synthesis technique that creates timbre by adding sine waves together. The timbre of musical instruments can be considered to consist of multiple harmonic or inharmonic partials or overtones. VirSyn already has a remarkable track record of products ( CUBE, POSEIDON ) trying to make this virtually unlimited synthesis method manageable for creative sound designers and musicians. AddStation is the next step forward giving you a tool to explore completely new sonic territory. The massive amount of sine waves in AddStation - thousands per voice - together with unique morph sequencing blocks blur the frontiers between analog and digital sonic realms. And all this integrated in all relevant iOS production environments especially the emerging AUv3 AudioUnit standard. Synthesis • Fractal additive synthesis • over 170 sound presets • Four parts with 8 Additive Sequence Blocks • Sound morphing • up to 512 partials per voice with independent AD envelopes • harmonic/inharmonic spectra • Ringmodulation • arbitrary filter function and noise spectra • four independent analog style Arpeggiators Effects • Chorus • Phaser • Flanger • Overdrive • Parametric EQ • Echo/Delay • Reverb Global • AUv3 for Host integration • Audiobus 3 compatible (Input slot) with state saving • Support for Ableton Link. • Inter-app audio compatible (Instrument/Generator) • CoreMIDI / Virtual MIDI • Audio recorder. ## Key features - Fractal additive synthesis - Sound morphing - Over 170 sound presets - AUv3 AudioUnit integration - Built-in effects suite - Audiobus 3 and Ableton Link support ## Recent user reviews (10 of 39) All indexed reviews: https://appshunter.io/ios/app/addstation/id1500919657/reviews.md ### 5/5 — WoW! Amazing... *2026-08-06* For example-modulation and draw your own filter tone etc across ANY sounds and even percussions arp. Etc blocks of sonic designing bliss!!!!! ### 3/5 — Buggy as an AUv3 plugin *2025-07-26* Can’t seem to get this to work inside Nanostudio 2 as a plugin. The audio is distorted and harsh. Only when I open the standalone version of AddStation alongside Nanostudio 2 does the audio clear up. ### 1/5 — One of my best synths *2025-01-15* Ever since updating my iPad to iOS18, all my many Cubasis 3 projects that used Addstation presets before the update now no longer work, I constantly get the “Plug-in Not Found”. When I relaunch Addstation in the affected projects, there is no indication of what presets were originally used and without me having a super memory, there is no way I can restore my original project. All new projects after updating to iOS18 will open as normal. 2 Years Ago. I purchased this awesome synth last September (2021) and have used it extensively in many Cubasis3 projects, it really has mind blowing presets that can be expanded further to create even more complex sounds. There are many times where I just go through the presets range to familiarise myself with them and end up creating a completely new project. This is definitely one of my “go to synths”. ### 4/5 — Help! Compatibility w/ Logic Pro & GarageBand is broken *2024-11-30* Please investigate. This no longer validates as an AU in Logic Pro on macOS and in both versions of GarageBand. I suspect Apple’s own security update or this last app update must’ve done it. ### 1/5 — Funktioniert nicht mehr. Liegt das am neuesten iOS? *2024-11-18* Siehe Titel, ist nach längerer Nichtbenutzung plötzlich absolut stumm. ### 2/5 — No sound *2024-11-12* No sound on the latest iPad Pro models ### 4/5 — Awesome synth, unmatched sounds *2024-10-31* But please see if you can bring it up to compatibility with Apple Silicon Macs for Logic Pro and GarageBand. Thank you! ### 5/5 — An awesome synth with unmatched sounds *2023-04-21* But please see if you can bring it up to compatibility with Apple Silicon Macs for Logic Pro and GarageBand. Thank you! ### 5/5 — I own a Kawai K5000 and this is better! *2022-12-20* This app is so good... I actually bought this after I picked up a K5000 and found out this developer was a long time, active K5000 who made this app! The K5000 sounds different, sure, the effects and that are part of the sound. But if I had to say which one is better? It would have to be the Addstation. Its like a K5000 updated to today's specs. I still love my K5000 though, the feel of the keyboard alone is enough to hang on to it... and it looks sexy too! ### 5/5 — Oops… Harry Gohs apps! *2022-11-01* I think I mentioned a competitor’s name by mistake in the first review. The sentiment was correct, the name was wrong! Let me recap: This was the most recent purchase of this dev’s products. I have purchased newer apps of his, and this just goes to show that I’ve enjoyed them! I’ve watched the reviews over and over, judiciously choosing which ones to buy. NONE of them have ever disappointed me! Without rambling further, I’ll just say that IMO, they are ALL great stuff! ## Frequently asked questions about AddStation ### What is additive synthesis? Additive synthesis is a sound generation method that builds complex timbres by combining multiple sine waves. The resulting sound's character is determined by the number, frequency, and amplitude of these sine waves, allowing for the creation of rich and nuanced sonic textures. ### What are the key synthesis features of this app? This app features fractal additive synthesis with up to 512 partials per voice, independent AD envelopes, harmonic/inharmonic spectra, ring modulation, and arbitrary filter functions. It also includes four independent analog-style arpeggiators and sound morphing capabilities. ### What audio effects are included? The app comes with a comprehensive suite of built-in effects to further shape your sounds. These include Chorus, Phaser, Flanger, Overdrive, Parametric EQ, Echo/Delay, and Reverb, allowing for extensive sound manipulation. ### How does this app integrate with other music production tools? It offers robust integration with iOS production environments, supporting the AUv3 AudioUnit standard for seamless use within compatible DAWs. It is also compatible with Audiobus 3, Ableton Link, and Inter-app audio (Instrument/Generator), along with CoreMIDI and Virtual MIDI support. ### Is this app suitable for beginners? While the app offers advanced synthesis capabilities, it also includes over 170 sound presets to get users started. The ability to explore new sonic territory makes it appealing to both experienced sound designers and musicians seeking to expand their creative palette. ## Version history (last 5 releases) ### 1.3.3 — 2024-12-04 - Mac AUv3 working again ### 1.3.2 — 2024-11-27 - Fixes no sound on some devices running iOS18 ### 1.3.1 — 2021-01-29 - "Save as" bug fixed - crash on specific Preset fixed. ### 1.3.0 — 2021-01-26 - User preset library from Pxlhg added - Preset library export/import fixed - Move preset function is back - Other bugfixes ### 1.2.1 — 2020-12-21 - Improved workflow for saving presets ## Apps similar to AddStation | App | Rating | Price | Category | | --- | --- | --- | --- | | [Poison-202 Vintage Synthesizer](https://appshunter.io/ios/app/poison-202-vintage-synthesizer/id1145895278) | 4.7 (290) | $9.99 | Music | | [TB Lowtone](https://appshunter.io/ios/app/tb-lowtone/id6448315127) | 4.4 (14) | $9.99 | Music | | [SynthMaster One](https://appshunter.io/ios/app/synthmaster-one/id1254353266) | 4.7 (740) | $2.99 | Music | | [Roxsyn Guitar Synthesizer](https://appshunter.io/ios/app/roxsyn-guitar-synthesizer/id1472450599) | 4.7 (90) | $19.99 | Music | | [Senode - Graph Sequencer](https://appshunter.io/ios/app/senode-graph-sequencer/id1298766877) | 4.6 (35) | $12.99 | Music | | [Oscidia](https://appshunter.io/ios/app/oscidia/id6748944379) | 4.8 (12) | $14.99 | Music | ## More apps by Harry Gohs - [iVoxel](https://appshunter.io/ios/app/ivoxel/id382428641) - [iSyn Poly](https://appshunter.io/ios/app/isyn-poly/id443141370) - [Addictive Synth](https://appshunter.io/ios/app/addictive-synth/id447072653) - [Addictive microSynth](https://appshunter.io/ios/app/addictive-microsynth/id455651228) - [Harmony Voice](https://appshunter.io/ios/app/harmony-voice/id532501340) - [AudioReverb](https://appshunter.io/ios/app/audioreverb/id670248970) All apps by Harry Gohs: https://appshunter.io/developer/382428644 --- *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 2026-08-30.*