Replaces the Task 3 smoke-test Program.cs with the full inference loop:
- PA_ALSA_PLUGHW=1 and ORT_LOGGING_LEVEL=3 via both Environment.SetEnvironmentVariable
and Libc.setenv (P/Invoke) per the Test 1 findings.md env-var gotcha.
- OrtEnv.CreateInstanceWithOptions with ORT_LOGGING_LEVEL_ERROR to suppress
early GPU-discovery warnings from device_discovery.cc in ORT 1.26.0
(the env var alone does not silence these; CreateInstanceWithOptions does).
- Callback-driven PortAudio input stream at 16 kHz / Int16 / 1280 frames/block.
- BlockingCollection<short[]>(16) queue; per-call new short[1280] allocation (no races).
- Main loop: Take() -> WakewordModel.Predict() -> threshold >= 0.5 with 1.0s cooldown
-> DETECTED alexa score=... t=...s. No beep (Task 5 adds it).
- Console.CancelKeyPress -> cts.Cancel() -> graceful stream.Stop() + model.Dispose()
+ PortAudio.Terminate().
tes
2e830eaed4