# 055U4RY — OSSUARY: horror AUv3 synth > Horror-themed 8-voice polyphonic synthesizer with a haunted DOS terminal interface. (iPhone/iPad app by LASZLO DOBROVOLSZKI.) - Source: https://appshunter.io/ios/app/055u4ry/id6789734684 (this page in markdown: same URL + `.md`) - Developer: [LASZLO DOBROVOLSZKI](https://appshunter.io/developer/6779159106) - Category: Music - Price: $6.99 - Rating: 5.00/5 from 9 App Store ratings · 4 written reviews indexed - Age rating: 9+ - Requires: iOS 17.0 · 2 MB - Languages: American English - Released: 2026-07-16 - Data updated: 2026-08-25 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/055u4ry/id6789734684/reviews.md ## What is 055U4RY? 055U4RY (say it: "ossuary") is an 8-voice polyphonic AUv3 synthesizer and an AUv3 FX, sealed together inside a haunted DOS terminal. A photographic ASCII skull is the front panel: its jaw hinges open with the amplitude envelope, its eye sockets ignite with the output level, and the whole interface tears, melts and reassembles itself while you play. THE VOICE - 15 synthesis engines: detuned saw/square/triangle unison stacks, sine and sub-oscillators one and two octaves down, two-operator FM, ring modulation and inharmonic partials. Every factory preset is a different engine. - Twin chaotic LFOs that cross-modulate each other's RATE, so pitch and filter drift never repeats. Held notes stay alive and slightly wrong. - A Shepard-Risset layer tuned beneath every note: five windowed partials in an endless downward glissando - the bottomless-pit illusion of classic horror scoring, fused into the oscillator core. - A 19 Hz infrasonic tremolo at the edge of perception. On headphones it is a shiver; on a big system it is pressure. THE CHAIN - State-variable filter, low-pass or band-pass per engine, with resonance that will scream - Sample-rate reducer and bit-depth crusher for terminal-grade lo-fi - Saturating drive stage - GLTCH: a real-time stutter buffer that seizes and re-loops your signal - CRYPT: a damped, pitch-black comb/allpass reverb - GLIDE: exponential portamento up to 1.5 seconds - DOOM: one macro that leans the chaos, the descent and the tremor deeper into the signal PERFORM - 14 knobs, all ASCII, every one audible on every preset - 15 factory presets with per-preset patch memory: your tweaks persist for each preset, and [RESET] restores the factory sound - Two-octave on-screen keyboard with octave transpose and note names - Hardware MIDI in (all sources auto-connect), built-in Bluetooth MIDI pairing, pitch bend, MIDI 2.0 aware - The skull is your meter: jaw = envelope, eyes = level, decay = how hard you push GLTCH AUv3 SYNTH + AUv3 FX + STANDALONE Runs standalone with zero setup, and installs as an AUv3 instrument and an AUv3 FX in your host: AUM, Logic Pro, GarageBand, apeMatrix, WBTRK and any AUv3-compatible DAW, with full parameter automation. One purchase, every platform: iPhone, iPad and Mac. No accounts, no ads, no data collected - your patches never leave the device. ## Key features - 8-voice polyphonic synthesizer - 15 synthesis engines - Twin chaotic LFOs - Shepard-Risset layer - State-variable filter - Sample-rate reducer and bit-depth crusher - Real-time stutter buffer (GLTCH) ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/055u4ry/id6789734684/reviews.md ### 5/5 — 堀さん *2026-07-30* まずは時代は変わったんだなと。こうゆう自由な発想のbytebeatアプリが出てきた事に驚きです。音は正統派でインダストリアル&ロックな雰囲気。AU対応、midiにも対応は凄いです。現時点で殿堂入りですが、ユーザーがコードを作って読み込めれば伝説的bytebeatアプリになると思います。 ### 5/5 — 🕯️💀Infernal Sounds💀🕯️ *2026-07-30* It’s dark and noisy af 🔥 🐀🐀🐀🐀🐀 **Developer response:** Anything musical that escapes is a bug I haven't located yet. Thank for the rats! ### 5/5 — It rules! *2026-07-29* Such a fun synth to play! If the presets are too noisy for you, mess with the settings. I like making it sound just musical enough. I love the skull guy so much! I try to leave silence long enough for him to close his mouth (I like making the skull look like he’s talking, don’t judge me!). **Developer response:** Nobody here is judging. Skull guy does, obviously. But he's in no position to bring it up. ### 4/5 — Very unique synthesis *2026-07-22* It has some lo fi grunge and doom, but there is more nuances here than most noise makers. Some of the glitches are real sweet and the experimental aspect shines. Seems like there are quick fixes and a responsive dev so cheers to that. This is for the wilder synth type world where you have to fit your self into its features , and not so much looking for normal synth things. Hails dark wizard **Developer response:** Normal synth things were considered and rejected early in development. Glad the nuance came through under the doom — fixes will keep arriving at unreasonable hours. Hails. ## Frequently asked questions about 055U4RY ### What is 055U4RY? 055U4RY is an 8-voice polyphonic synthesizer designed to create horror-themed soundscapes. It features a unique visual interface and a variety of synthesis engines and effects. ### What synthesis engines does 055U4RY offer? 055U4RY includes 15 synthesis engines, such as detuned saw/square/triangle unison stacks, sine and sub-oscillators, two-operator FM, ring modulation, and inharmonic partials. Each factory preset utilizes a different engine. ### Can 055U4RY be used with other music apps? Yes, 055U4RY runs standalone and also installs as an AUv3 instrument. It is compatible with DAWs like AUM, Logic Pro, and GarageBand, supporting full parameter automation. ### What platforms is 055U4RY available on? 055U4RY is available for iPhone, iPad, and Mac with a single purchase. It requires no accounts and collects no user data. ### How much does 055U4RY cost? 055U4RY is a paid application priced at $4.99. There are no in-app purchases or subscriptions. ### Does 055U4RY have ads? No, 055U4RY is completely ad-free. The developer explicitly states that there are no ads and no data is collected. ### What is the age rating for 055U4RY? 055U4RY has an age rating of 9+. This is based on its content and suitability for younger users. ### How often is 055U4RY updated? The latest version of 055U4RY is 1.0, and it was last updated on July 16, 2026. Future updates will likely focus on new features and bug fixes. ## Version history (last 5 releases) ### 1.31 — 2026-08-04 ⏺ Transmission 1.31 — misbehaving headstones. In IPad landscape mode the FX part got haunted out of this world, now we chained them back to the graves. The cursed bats are also have better manners now. ⏺ Transmission 1.30 — the crypt opens for everything else. 055U4RY is now two plug-ins: the AUv3 synth, and a new AUv3 FX. Put a drum loop, a guitar or a whole mix through the same fifteen rites and the same panel you already know. Buying today or updating from 1.20, everyone gets both. One app, one price. ### 1.30 — 2026-08-03 ⏺ Transmission 1.30 — the crypt opens for everything else. 055U4RY is now two plug-ins: the AUv3 synth, and a new AUv3 FX. Put a drum loop, a guitar or a whole mix through the same fifteen rites and the same panel you already know. Buying today or updating from 1.20, everyone gets both. One app, one price. ### 1.20 — 2026-07-29 - HOLD: a glitching pentagram above the keyboard latches notes and chords. Tap to arm, play while it blinks, and the drone sustains itself — hands free for the knobs. Tap again to release the spirits. - USER PRESET SLOTS: three 6s in the SYS panel. Long-press to bind your patch, tap to summon it back, [x] to banish it — every destructive rite asks twice. - Rate us in SYS: five pentagrams on the App Store keep the furnace lit. Our gratefulness will follow you to the other side. - iPad landscape earns a real layout: dials spread wide in a single row, bigger presets, the skull perched over a larger keyboard — no more letterboxed portrait. ### 1.11 — 2026-07-23 Transmission 1.11 — the slab turns. - iPad: landscape orientation is back. Rotate freely — the séance now works sideways. iPhone remains locked in portrait. ### 1.1 — 2026-07-22 NEW - iPad interface rebuilt for the bigger slab: full-width preset pile, roomier knobs, a larger skull, and a third keyboard octave reaching down to C2 — where the doom lives. - The same wider layout appears inside AUv3 host windows (AUM, GarageBand, WBTRK). FIXED - The filter could emit invalid audio (NaN/Inf) at certain CUTOF/RESO settings, silencing the signal chain in some hosts. The SVF is now unconditionally stable — sweep it as violently as you like. - AUv3 state saving implemented: your knob settings survive host session save/reload, and user presets now work in AUM, Logic, GarageBand and friends. - Sample-accurate MIDI: notes land exactly on their scheduled sample within the buffer — tighter sequencer timing, especially at large buffer sizes. - Hardware keyboards no longer risk doubled notes after reopening the SYS panel. - Lower key-press latency in the standalone app. - Locked to portrait on iPad as well; status bar banished for a fully immersive séance. ## More apps by LASZLO DOBROVOLSZKI - [WBTRK](https://appshunter.io/ios/app/wbtrk/id6779159104) - [NCTRN](https://appshunter.io/ios/app/nctrn/id6792679679) All apps by LASZLO DOBROVOLSZKI: https://appshunter.io/developer/6779159106 ## Related topics [synthesizer video](https://appshunter.io/ios/topics/synthesizer-video) --- *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 2026-08-25.*