Package-level declarations

Multi-metric batch analysis facade — breath, agility, and vocal range from a single PitchContour.

Public facade for vocal agility analysis.

Public facade for breath analysis — control score, phrase structure, and reference comparison.

Public facade for batch vocal range analysis, search vector creation, and song matching.

Guided vocal range detection session with observable state.

Streaming multi-metric session — feed audio incrementally, get results on demand.

Public facade for natural speaking pitch detection.