Chapter 133 · design projection

Csound AUv3 Instrument

Prepared Csound DSP behind a host-clocked Apple AUv3 boundary, with a separately admitted Reframe MIDI 2.0 seam.

Designed Not host-accepted Not released

MIDI 2.0 ingress entering a transparent AUv3 frame containing prepared Csound DSP and leaving as host-clocked audio — Principal Chapter 133 boundary illustration. It is a deterministic design projection, not an AUv3 bundle, audio measurement, AUM proof, MIDI 2.0 terminal event, Store receipt, or licensing clearance.

Instrument identity

Capability: fountaincoach.csound-auv3
Scenario: csound-auv3-instrument-boundary
Operation: reframe/audiounit.lifecycle
Manufacturer identity: Fountain Coach · MIDI Association identity pending assignment
Boundary: Csound engine → AUv3 extension → host-clocked render callback

The governed journey

deterministic .csd
→ non-real-time prepare / compile / allocate
→ AUv3 render-safe callback
→ measured audio and lifecycle receipt
→ Reframe MIDI 2.0 adapter (separate acceptance)

Evidence boundary

Chapter 133 requires a reproducibly identified Csound artifact, signed native AUv3 extension, named host witness, render stress evidence, typed lifecycle receipt, and explicit conversion-loss policy. None of those runtime or release claims is established by this catalog projection.

Read Chapter 133 · Read Reframe behavior and scenarios · Read the MIDI2 contract