Musicmeeter (Build Week draft)

Draft placeholder for OpenAI Build Week. The final wording, video link, repository link, /feedback Session ID, and final demonstrated feature set still need to be replaced before submission.

Musicmeeter is an existing experimental Windows audio system. During OpenAI Build Week, the submitted slice focuses on turning a previously fragmented audio path into an observable test stand for real player and format-transition evaluation.

The current Build Week story is not "a finished audio product". It is a bounded, working test environment for evaluating a Windows playback path before the next output stage is expanded. Successful playback alone is not treated as proof that every layer behaved correctly; the goal is to preserve lifecycle, format identity, packet ownership, provenance, and evidence across the path.

Build Week delta

Before Build Week, Musicmeeter already contained driver, runtime, UI, and diagnostic components. The week began with a documented baseline and a GPT-5.6-assisted analysis of the full path across player actions, format transitions, 24-in-32 adaptation, WaveRT/driver queues, RuntimeService, WASAPI, and observer evidence.

That analysis reframed the old 24-in-32 issue as a cross-layer lifecycle, ownership, end-of-stream, and observability problem rather than a single local format bug. The resulting work is being integrated into the submitted player/format-transition test slice.

What the demo should show

• A real Windows player opens the Musicmeeter endpoint.
• The submitted test stand observes the playback path across endpoint, driver, runtime, and observer.
• A controlled format transition is demonstrated, for example 44.1 kHz / PCM16 to 96 kHz / 24 valid bits in a 32-bit container.
• The observer makes the transition visible instead of relying on audible playback alone.
• If completed in time, the recovered sequence/fingerprint matcher is mapped or reattached as the next provenance step without exposing audio payloads.

What is intentionally not claimed

• This is not a finished consumer audio product.
• It is not a universal player compatibility claim.
• It does not claim full end-to-end DAC proof unless the final evidence supports that.
• It is a controlled test stand for the demonstrated players, formats, and evidence path.

Codex and GPT-5.6 role

Codex was used as the main implementation partner. GPT-5.6 was used to evaluate the complete audio path, distinguish local symptoms from cross-layer contract failures, and turn the findings into an implementation plan for the Build Week slice.

Final README, repository access, install/test instructions, and the actual /feedback Session ID still need to be added before submission.

Built With

• c#
• c++
• codex
• driver-development
• gpt-5.6
• observability
• powershell
• wasapi
• wavert
• windows-audio