Audio Normaliser

Measured against a real standard, not a volume slider.

This measures integrated loudness per ITU-R BS.1770-4 — the same measurement YouTube, Spotify and podcast platforms normalise against — not a naive peak or RMS scaling that gets the number wrong for anything with quiet passages or a wide dynamic range.

The safety limiter here works on the exact sample peak, not the true (inter-sample) peak BS.1770-4 also defines — a smaller, honest scope. If avoiding clipping meant backing the gain off, the result can land a little under the requested target rather than risk clipping, and that is called out below when it happens.