phase information removal.
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# Decision 0004: JACK backend and bounded plan handoff
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**Status:** Accepted for Phase 2
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**Status:** Accepted
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## Backend
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@ -81,9 +81,9 @@ Plan replacement starts the newly compiled oscillator at phase zero, without
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crossfade. Smooth parameter ramps and click-free graph transitions are future work.
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No stereo, recording, MIDI, native PipeWire API, GUI engine controls or hardware
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configuration dialogs are part of this phase.
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configuration dialogs are included.
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## Phase 4 adoption acknowledgement and stopped editing
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## Adoption acknowledgement and stopped editing
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The pending pointer has an associated atomic revision. Producer stores the
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revision before release-publishing the pointer. Consumer acquire-loads a
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# 0005: Preloaded WAV clips and control-thread recording consumer
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Status: accepted for Phase 6.
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Status: accepted.
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Use a small bounded C99 WAV decoder/writer for PCM16/24/32 and IEEE float32,
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mono/stereo, instead of adding libsndfile in this milestone. This avoids a new
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# 0006 — Bounded MIDI notes and internal instrument
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Status: accepted, Phase 7.
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Status: accepted.
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Use the existing JACK backend for timestamped MIDI input, avoiding another
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backend/dependency. Store source-relative notes in the C project and v3 format;
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# 0007 — Track mixing, paired stereo buses and snapshot history
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Status: accepted, Phase 8.
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Status: accepted.
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Apply gain/pan/mute/solo and gain/pan automation in prepared track sources, then
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run paired stereo buses through the existing modular topology. This preserves
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# 0008 — Native processors and source release preparation
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Status: accepted, Phase 9.
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Status: accepted.
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Add a versioned copied C descriptor with control-thread prepare/destroy and
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single-owner realtime reset/process. Prove effects/sources in the existing graph,
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# 0009 — Parameter processors and bounded LADSPA hosting
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Status: accepted, Phases 14–15 (2026-10-27).
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Status: accepted (2026-10-27).
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Native ABI 1 remains compatible. ABI 2 adds explicitly parameter-only configuration,
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metadata, validation and sample-offset parameter/MIDI ordering. It is a public C
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@ -8,7 +8,7 @@ facility; opaque state and automatic native descriptor registration in project
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files remain unsupported. Native instrument and gain examples exercise the
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interface before adding a dynamically loaded module lifetime.
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Select LADSPA 1.1 for the first external host. Reconsidering the Phase 9 candidates,
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Select LADSPA 1.1 for the first external host. Reconsidering earlier candidates,
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LV2 needs RDF/features/URIDs/workers, CLAP needs host scheduling/extension
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negotiation, and VST3 needs a separate C++ SDK adapter and release-specific license
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review. LADSPA adds a mature Linux C ABI, installed real plugins, straightforward
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@ -28,8 +28,8 @@ and 16 input controls. Graph stereo consists of independent instances, not a
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stereo LADSPA layout. Reject incompatible layouts and identities explicitly.
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Control outputs are connected to private storage, not exposed as graph events.
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LADSPA has no MIDI or opaque state API: save control values only. Parameter
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changes rebuild plans on the control thread; sample automation is deferred to
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Phase 16. Rate-scaled bounds are recalculated at compile. Instance history/tails
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changes rebuild plans on the control thread; sample automation is provided through
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parameter processors. Rate-scaled bounds are recalculated at compile. Instance history/tails
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reset on recompile, not every transport seek (LADSPA has no realtime reset rule).
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Latency compensation is unsupported: the supported set is zero-latency amp,
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inverter and sine source, not arbitrary lookahead/delay/routing plugins.
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# 0010 — Bounded CLAP, VST2 and VST3 effect loading
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Accepted for Phase 31. The user's request to support these three formats
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Accepted. The user's request to support these three formats
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supersedes the earlier recommendation to choose only one external format.
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Keep the engine/model/host adapters in C99. CLAP uses pinned MIT headers and VST3
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# 0011 — Prepared MIDI track instruments
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Accepted for Phase 32. Extend the modern C99 adapters with zero-audio-input,
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Accepted. Extend the modern C99 adapters with zero-audio-input,
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mono-output instruments and one event input. Keep graph effects separate from
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track bindings. Each assigned track owns one prepared instance; the existing
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instrument source sums their mixed output and the sine output of unassigned
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