loudness

Loudness: how loud a recording is as a figure that can be compared, rather than as a peak. K-weighting coefficients at whatever rate the samples carry, four-hundred-millisecond blocks at three-quarters overlap, the absolute gate at minus seventy LUFS and the relative gate at minus ten loudness units, giving the momentary and short-term maxima. True peak is taken apart from loudness, by fourfold polyphase reconstruction. A ceiling in decibels true peak is held by a look-ahead limiter, and both figures stand before and after, so a change is shown and not merely claimed. Channels, a rate, a target in LUFS and a ceiling in dBTP in, a loudness report out, and where a new buffer is asked for, that buffer with its own report.