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Limestudio90andClaude Opus 5.5
245015fd89
`IHostApplication::createInstance` returned nothing, so plugins whose controller and processor exchange `IMessage`s through `IConnectionPoint::notify` could not create one. Line 6 Helix Stadium Native reported "Failed to get content database recovery info (Out of memory condition. [code -2])", loaded no models and exposed no parameters. The host now creates `IMessage` (an id plus its attribute list) and `IAttributeList` (ints, floats, UTF-16 strings and binary blobs, by NUL-terminated attribute id). Strings and blobs are kept in their own allocation so pointers from `getBinary` stay valid while the list holds the value; strings are capped at 1M UTF-16 units and blobs at 256 MiB. Null arguments are refused rather than read. Other classes are still not provided. Verified with Helix Stadium Native 1.03.3a on Windows: the error is gone, its model database and presets load, and its parameters appear in the generic plugin window. A unit test drives the objects through the COM interfaces the way a plugin does. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
65 lines
5.2 KiB
Markdown
65 lines
5.2 KiB
Markdown
# Plugin parity: built-in processors and plugin hosting
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> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-13 · **Change:** minor (VST3 host messages: IMessage and IAttributeList; previously minor: plugin editors on Windows) · **Target:** Avid Pro Tools Ultimate 2026.4.1
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Pro Tools users live in plugins: the bundled set covers everyday mixing, and third-party plugins
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cover the rest. This doc tracks both. Our plugins have our own names and are written from
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scratch (clean-room rule): Avid plugin names are not used here, only categories.
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**Built-in plugins and AudioSuite: breadth ~40 %, ready ~35 %** (80–120 h).
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**Third-party hosting: breadth ~70 %, ready ~45 %** (40–60 h). Both estimated.
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## Built-in processors (measured from `crates/dsp/src/plugins`)
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| Category | Pro Tools bundles (approx., by category) | SoundCraft (ids) | Gap |
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|---|---|---|---|
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| EQ | 1-band and 7-band EQ, channel strip, vintage EQ models | `eq_1band`, `eq_7band`, `channel_strip` | Vintage models, linear phase, dynamic EQ; parametric UI (#139) |
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| Dynamics | compressor/limiter, expander/gate, de-esser, maximizer, vintage compressors, multiband | `compressor`, `expander_gate`, `de_esser`, `maximizer` | Vintage/opto models, multiband, sidechain input (no key input anywhere) |
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| Reverb | algorithmic room/plate/hall; convolution (paid tier) | `room_reverb`, `plate_reverb` | Hall/chamber, convolution, early-reflection editor |
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| Delay | modulated delay, tape/analog delays | `mod_delay` | Tape, ping-pong, multi-tap, tempo-sync depth |
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| Modulation | chorus, flanger, phaser, tremolo, ring/frequency shift | `chorus`, `flanger`, `phaser` | Tremolo, auto-pan, ring modulation |
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| Harmonic | lo-fi, rectifier, amp simulation, saturation, tape | `lofi`, `rectifier`, `saturator` | Amp and cabinet models, tape |
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| Pitch and time | pitch shift, varispeed effects, time shift | `pitch_shifter`, `time_shift` | Formant control, varispeed effect, pitch correction |
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| Utility | trim, gain, invert, DC offset, signal generator, dither, time adjuster | `trim`, `gain`, `invert`, `dc_offset_removal`, `signal_generator`, `dither` | Time adjuster, meter/analyzer plugins, noise shaping options |
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| Instruments | several virtual instruments (multi-sampler, piano, drum machine, organ, synths, sample player; Massive X Player added in 2026.4) | `subtractive_synth`, `drum_synth`; `mix.instrument` takes the instrument's parameters in `params` and refuses unknown fields (#265) | Sampler (PR #108 open), piano, organ, wavetable, content library |
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| **Total** | **≈ 80 processors and instruments** (estimate from Avid's bundle documentation) | **26 processors + 2 instruments** | |
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AudioSuite: every catalog AudioSuite leaf maps to one of our processes (`AUDIOSUITE` in
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`crates/ui-egui/src/menus.rs`), so the AudioSuite menu is 100 % present. Depth: no preview,
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handles, "clip by clip / entire selection" and multi-input modes beyond the basics; hosted
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plugins can't be used offline as AudioSuite yet.
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Fidelity: **unmeasured.** Nothing compares a SoundCraft processor's frequency response, gain
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reduction curve or reverb tail with the Pro Tools equivalent (G-07 in [`gaps.md`](gaps.md)).
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User report #152: a saved instrument level does not reach the bounce.
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## Third-party plugin hosting
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| Feature | Pro Tools | SoundCraft | Notes |
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|---|---|---|---|
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| Plugin format | AAX only (Native and DSP) | CLAP, VST3, Audio Units (macOS) | Users' libraries mostly ship VST3/AU too. AAX (#109) needs Avid's SDK licence and PACE signing: owner decision, likely never |
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| VST2, LV2, LADSPA | — | ❌ (#30) | Beyond Pro Tools; VST2 SDK is no longer licensable |
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| Scan, vendor menus, instrument picker | ✅ | ✅ | #23 |
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| Audio, parameters, automation, latency (PDC) | ✅ | ✅ | |
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| Notes / MIDI to instruments | ✅ | ✅ | But no live MIDI input (G-02) |
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| State saved in sessions, presets | ✅ | ✅ | |
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| Create/destroy off the audio thread | ✅ | ✅ | |
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| Editors: CLAP | — | 🟡 floating windows; embedded editors on Windows | Embedded on macOS/Linux missing |
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| Editors: VST3 | — | 🟡 macOS (verified with a commercial pitch editor) and Windows (verified with a free JUCE compressor) | Linux views missing |
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| Editors: AU | — | ❌ | Cocoa view hosting missing |
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| Multiple editor pages | ✅ | 🟡 | #6 |
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| macOS hardened-runtime entitlement for third-party code | ✅ | ❌ | #153, #149 — signed builds refuse third-party VST3 |
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| Sidechain / key input | ✅ | ❌ | All three hosts |
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| ARA 2 (pitch/time editors in the timeline) | ✅ | ❌ | Menu leaves Track/Clip/Window ▸ ARA still missing |
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| Crash isolation | in-process (DSP on HDX) | in-process | Out-of-process hosting would beat Pro Tools |
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| Plugin delay reporting changes on the fly | ✅ | 🟡 | Aux insert latency bug #103 (PR #133) |
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## Revision history
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| Date | Change | Summary |
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|---|---|---|
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| 2026-10-13 | minor | VST3 host: IMessage and IAttributeList for plugins whose halves talk through messages (Line 6 Helix Stadium Native verified) |
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| 2026-10-13 | trivial | mix.instrument sets built-in instrument parameters in params (#265) |
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| 2026-10-12 | minor | Editors: VST3 and embedded CLAP editors on Windows |
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| 2026-10-10 | major | Created: built-in processor inventory by category and third-party hosting checklist |
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