Test results
24 apps. 24 checked in the Codex browser. 63 audio measurements. All 69 recordings passed hash and duration checks.
Interface revision
All 24 updated pages were checked again for playback, browser errors and unwanted boilerplate. Each produced audio. The index has two tabs, Listen and Prompt. Chart controls and keyboard interaction remain functional.
Checks
The browser checks cover playback, source controls, stop, import, processing, scene persistence and the ten-second timer. Cancelling the timer during its fade restores playback. The map accepts keyboard input and changes synthesis parameters.
Noise spectra follow the expected white, pink and brown distributions. Ring modulation at 440 × 80 Hz produces components near 360 and 520 Hz. Recorded measurements are finite. These checks do not cover every possible control combination or a timer running for several hours.
Corrections
The first musical phrase failed when changing modes. Student feedback led the agent to correct oscillator start/stop order. A malformed HTML option also hid the imported-audio choice in the lo-fi comparison. Both corrected versions were checked in the browser. Initial attempts and follow-up prompts are preserved.
Build method
Each app started in a fresh agent context with its saved text prompt. Extensions could read the declared previous app code. Pocock skills were not invoked. The builder retained normal model knowledge and operational instructions; this is not a controlled test of a beginner's ability.
The current interface uses a shared monochrome style and concise English labels. Chart geometry, contours, axes, data and interactions remain intact. Archived attempts retain their original appearance.
Limits
Playback and signal measurements were verified. No subjective judgement of musical quality, emotion or fatigue is claimed. The native file-picker test took a long time; additional import checks used the real browser engine without reopening that picker.
Local setup
Codex blocks file:// URLs. The included Python server serves this folder on 127.0.0.1:4191. See setup. No required audio assets are missing; a voice recording for the vocoder is optional.
Slide deck unchanged: true. Evidence summary · Interface revision · Engine parity