Map a metric weight (0–3 from metricWeight) to a base onset
probability before density scaling. Strong positions are much more likely to
carry an onset than weak ones; the curve is intentionally small and explicit
so its behavior is easy to inspect and test.
Map a metric weight (0–3 from metricWeight) to a base onset probability before density scaling. Strong positions are much more likely to carry an onset than weak ones; the curve is intentionally small and explicit so its behavior is easy to inspect and test.